"Pwah!"

A strong popping sound echoed through Nepgear's bedroom as Uni and Nepgear broke the seal caused by their lips having been locked together. Having nearly run out of breath from their recent kiss, the two candidates panted , breathing heavily to fill their lungs back up with oxygen.

"Hah, U-Uni… you're being a bit too passionate here, could you maybe- WHATTHEGOODNESS?!" Uni was the first of the two to recover, so she took the lead by pinning her lilac-haired partner to the bed they were currently rustling around in. The white-haired sister held herself above the Planeptunian candidate as the sheets flowed down from off of her sides. With a lick of her own lips, Uni made it known that she was a creature of desire, and the girl pinned loosely to the pale purple bed by her wrists beneath her was her prey.

"Uni?" Nepgear asked gently, like a mouse unaware of any danger.

"Huh? What is it, Nepgear?" Uni asked in a slightly annoyed tone, less than pleased that her partner had just broken the mood.

"Well, you said we were gonna do some lewd stuff, but…" The candidate trailed off in her speech, trying not to embarrass Uni.

"But…?"

"Well, do you actually know anything about, well, actually doing that?"

If she had broken the mood earlier, Nepgear had lethally suplexed it into a brick wall with that. A small blush of embarrassment grew on Uni's cheeks as she slowly let go of the pinned candidate. "O-Of course I know all about it!" Uni stuttered. "I know that you're supposed to… you just kinda… you gotta…" In her attempt to save her image of being brave, commanding, knowledgeable, and in charge, the girl had just made herself look like a silly ditz that lived in an innocent, boring world where the concept of dirty jokes doesn't exist. A pout formed on her face as she almost began to shed a tear or two out of embarrassment for the sorry display she had just showed Nepgear.

"Aww, don't cry Uni," Nepgear started to comfort the raven-haired girl, "I-I'm sure you'll be able to think of something we can do." As Uni covered her profusely blushing, embarrassed face up with her hands, the lilac-haired candidate began to try and think of something the two could do together before Uni died of embarrassment. "Say, we could ask our sisters what kinda stuff they do- WHATHAGUDMERRTH?!"

Nepgear's eyes widened in shock as Uni quickly suppressed her voice into muffles by covering the candidate's mouth with her hands. With a strong blush still very visible on her face, Uni rejected the idea. "No! That'd be so embarrassing! Noire would wonder if I'm doing Lastation proud in… that kinda things, and Neptune would tease us to death!" She had a point. A very good point. They couldn't just do nothing… Well, they could, but then their built-up tension would be further emphasized and they'd metaphorically die of horniness before they ever got the opportunity to put it to good use. They desperately needed help. It didn't matter if it came in the form of embarrassing sisters, online forums, or even-

The bedroom's door slammed open, letting bright light flow into the dimly lit room. A chill flew up the couple's spines as they scrambled to get away from each other and tried to act natural. That is, before the sight before them made them hug each other and scream in fear.

"Gooood evening girls!" A purple-hued dominatrix stood in the doorway, gazing upon the two girls holding each other. Iris Heart's usual smug grin slowly curled into a smile and she let out a chuckle, looking over the candidatess. They were in bed together, their hair was a mess, their clothing was ruffled, and there were a few lipstick marks that definitely were not there before. "My my, I never realized you two were that lewd!" Iris rhetorically stated in a giggly tone.

Oh goodness, Iris Heart had sensed the lewdness in the air and had tracked it down to the source. "P-Plutia… what are you doing transformed?" Nepgear asked very, very nervously. Iris Heart gave a long, drawn out series of intimidating giggles as she slowly walked towards the bed, prompting the candidate couple to hide behind the sheets.

"Well, my dear sweet little Neppy Jr, I just so managed to coincidentally overhear you two's… situation, and I figured that maybe you needed someone to… hmhmhm..." Planeptune's Ultradimension CPU laughed to herself for a moment before continuing. "Teach you about the finer points of intercourse?"

The mere thought of Iris Heart "teaching" them was enough to make them shake and shudder in fear. Uni was about to open her mouth to boldly say no and reject the dominatrix's offer, but right before she spoke shepaused and hesitated. She was actually considering the offer! The raven-haired candidate turned to Nepgear for approval. Nepgear, as one would have logically expected, furiously shook her head no before looking at Uni like she was an absolutely insane, one hundred percent certifiable mad lad.

"Wha- Oh c'mon Nepgear!" The tsundere suddenly begged.

"No! Nonononononono!" Nepgear was quick to blurt out as many nos of extreme disapproval as she possibly could. With accompanying head shaking, she elaborated on her reasons. "Uni, don't you remember what happened last time? We couldn't walk straight for days!"

Uni sighed. Nepgear was right. Despite that, Uni was still perfectly willing to take on the involved risks. "But think about it Nepgear! We don't have any clue what we're doing and she," Uni paused her sentence before mumbling her next word, "...unfortunately… does know about this kinda thing!"

Nepgear froze up. As much as she wanted to keep shaking her head and denying the request, Uni had a point. Conflicted emotions and feelings rose up inside of Nepgear, and started to rise to the surface as her facial expressions revealed her thoughts. Should she agree? Would Plutia ignore their limits and go beyond what she said she would do? DID THEY NEED AN ADUL-

"Oh you two…" The candidate couple sat up straight at attention the moment Iris Heart began to purr, pretending to be offended by the two before her, "You're being so rude, saying mean things about me while I'm right here in front of you…" The dominatrix's voice petered off as she began to slowly and menacingly walk towards the bed once more. "Maybe I should take back my offer to teach you about what you so desperately want to do, and punish you instead?" A giggle accompanied the statement as the CPU's smug smile morphed into a foreboding, sick, sadistic grin of an expression.

Uni flinched and Nepgear cowered in fear under the bedsheets in response to the busty and seductive sexual terror in front of them. Fortunately enough for the two lovers, Iris Heart couldn't hold back her composure for long before leaning back and laughing maniacally. "Oh, how you two always manage to entertain me. Don't worry, I won't punish you. My offer to teach you, however, is still available. All you have to do…" She leaned in with a menacing smile, her sentence trailing off, "...is ask. So, what will it be?"

The candidates let out the breath they'd been holding, each girl letting out a sigh of relief. The cycle began once again as Uni looked back to Nepgear for approval. After a few moments of hesitation, Nepgear nodded back to Uni in approval. She'd do it. Nervous, but wanting to act courageous in front of Nepgear, Uni turned to face Iris Heart and bravely spoke up. "We accept your offer to teach us, Plutia-"

"No, no, no." Iris Heart cheerfully interrupted. "Starting now, you will refer to me as Miss Iris Heart, and you will call me that until we are finished here. Understood?"

"Yes, ma'am!" The two candidates exclaimed, having to hold themselves back to prevent saluting.

Iris Heart stifled a laugh at the sight of the candidates moving so obediently already, acting as if she was a teacher of sorts. This was going to be, at the very least, very, very entertaining. Taking a few steps away from the purple candidate's bed, the dominatrix gave herself some room before clearing her throat to speak. "Alright then, students, we shall begin! Our first lesson will be about toys. I'll go over two kinds of toys that should be gentle enough for my sweet, fragile students, then show you how to use them, and then I'll allow you to try them out between yourselves. Mmmkay, girls?" The question was rhetorical. The two candidates had agreed to this; there was no going back now.

"Yes Miss Iris Heart!" The two candidates rang out obediently in response.

"Lovely! Lovely…" The tone in Iris Heart's voice was worrying, to say the least. The candidates had just started to regret their decision before the CPU began to give her lecture to her now captive audience. "The first toy I'll be teaching you about today is…" The "teacher" paused for a moment and snapped her fingers, followed by a long, pink, cylindrical object with one rounded end materializing and landing in dominatrix's hand. "A vibrator."

Uni and Nepgear looked at it with some ounce of shock. They knew what a vibrator was, and they had seen their share of raunchy content on the Internep that involved them, but they had never actually seen one in person. Iris Heart took note of her student's reaction, and figured that she wouldn't need to explain the tool she currently held in her hand. "Do you girls already know what a vibrator is? My, I never expected you two to be so perverted! Especially you, Neppy Jr." The CPU shot a suggestive glare at Nepgear, causing a typical anime nervous drop of sweat to roll down the candidate's face. "Regardless, if that's the case, we can skip the introductions and get right into the… demonstration! Will a volunteer please come to the front of the 'class'?"

Dialogue came to a screeching halt as awkward silence filled the room. Even if their bedroom wasn't truly a classroom, there was still the usual stigma against not wanting to be the first person to present or answer a question. In this case, neither of the younger sisters wanted to be the first one to "present". It wasn't until Iris Heart started to tap her foot against the floor with mock impatience that she finally got a response.

A black-sleeved arm hesitantly moved upwards, waving a flag of consent as the limb raised up high. "I'll do it!" Uni exclaimed courageously as she volunteered herself for the demonstration. Make no mistake; she was definitely worried. The only reason she volunteered, and she did so bravely, was because she didn't want to appear weak or scared in front of Nepgear. What would Nepgear think about Uni if she was weak? The dark candidate figured it was best to not think about that. She'd be brave and learn from Iris Heart, and then use that knowledge to give Nepgear a pleasuring she wouldn't forget!

With nervous enthusiasm, the tsundere-in-training scooted her way to the foot of the bed, letting her legs dangle off the side of the cushy bed as she sat only a few feet away from the dominatrix CPU. Iris Heart licked her lips as she observed the candidate willingly offer herself. In her usual chilling yet seductive and enticing voice, she began requesting something from Uni, "Hmm… Uni, dear, would you mind changing into your HDD form? Your human form is lovely, but your transformed form is especially cute, and it would be easier to strip, would it not?"

It took a moment for the request to register in Uni's head. After she shook off the fear related to the notion of willingly and obediently following Plutia's commands, she nodded her head. Shortly after, the candidate's body began to glow as she transformed into her Hard Drive Divinity gear, white drill hair and all. After finishing her transformation, Uni began to take her clothing off.

Well, at least, tried to take her clothing off. Never before had taking off her processor unit been a question in her mind, but now it was. Uni looked up to Iris Heart with a questioning look on her face. How in the goodness was she supposed to take her bodysuit off of her bo-

Riiiiip

Interrupting Uni's train of thought like a brick wall, the dominatrix had dug her nails into the suit and torn off a wide strip of the material, exposing both of the candidate's nethers. The Black Sister's eyes twitched as she saw Iris Heart ignorantly drop the scrap of clothing off to the side. "Plutia, w-what the hell was that for?!" Exclaimed the candidate.

"Now now, Uni, damage to your clothing isn't permanent, is it? All you have to do is untransform and change back, and it'll be just fine, won't it?" Iris Heart spoke gently and with a light tone before continuing, giving her a nasty glare while speaking in a flat, menacing voice. "And that's Miss Iris Heart to you. Remember, I am a proud supporter of capital punishment~" Shivers ran up the candidate's spines once more before the CPU continued, "Finally, enough of the foreplay. My body is simply aching to play with- no, to 'teach' you, Uni. Pay close attention, class!" With the class finally starting, Nepgear began to stare at Black Sister and Iris Heart. The gaze caused Uni to blush a little, knowing that she was about to have lewd things done to her while Nepgear watched.

For Plutia, however, there was no blushing; only lewd. "Now, I'm sure both of you already know this from browsing too much /nepgen/, but if you flick this switch here," she paused as she pushed a button on the bottom of the vibrator to start its moderately paced mechanical shivering before lowering the object close to Uni's womanhood, "It starts moving nice and slow."

Uni clenched her teeth, knowing that the moment Plutia started to tease her with the vibrator it would start giving her overwhelming pleasure. If she wanted to look brave, she had to act like this was nothing at all! Yeah, some measly vibrator was nothing she couldn't handle and-

"HYEEH?!" Surprised, Uni yelped in pleasure as Iris Heart unexpectedly and suddenly placed the phallic object's head against her womanhood. Despite the toy being on its lowest and slowest setting, its soft pulsations still brought surprising amounts of enjoyable sensations to her body.

"First," Iris Heart began to lecture, "We start of with some teasing. With a little bit of stimulation, the pet- oh, pardon me class, the partner's womanhood will start to get wet. This is very important for the next step, so make sure you follow my example and get this step right!" After finishing her instructions and seeing Nepgear's blushing face nod, the dominatrix kept teasing Uni's womanhood for a quarter of a minute longer, despite the candidate's body twitching frantically in response. Then, she brought her left hand's index finger down to her assistant's nether region,sliding it across to gather from the wetness, all while still using the right hand to hold the lewd object. Bringing the finger up to her mouth, she slowly lapped up the moisture covering it, licking her lips and humming in sadistic joy as the sweetness of Uni's juices graced her tongue.

"My my, Uni, you're already dripping wet?" The dominatrix teased. "Well, I guess the only thing I can do is help you with that~ Moving on to step two, we can start to apply force to her womanhood, using our brave volunteer's wetness as a form of makeshift lubricant in order to push the toy inside." With her mandatory, teacher-like instructing out of the way, Iris Heart began to push the vibrating toy against the sensitive folds of Uni's body.

That pressure proved to be all that was needed for Uni to start moaning more. "Nnnnn! Aaaah! Eeeeeh!" Each groan lasted for as long as Iris Heart applied extra force, and ended immediately after she let the vibrator rest. The candidate's body started to instinctually squirm as the sadist applied more pressure to the toy, the head of the phallic object threatening to slip in as it began to partially push aside the lips of her womanhood.

"And for the third step…"

"HAAAAH!"

"We push in just the tip!" Iris Heart spoke with enthusiasm as the head of the vibrator rumbled inside of Uni's inexperienced womanhood. The dominatrix's left hand quickly moved to grab the candidate's right leg as Uni's body writhed in pleasure, completely incapable of staying still as waves of ecstasy she had never before felt coursed throughout her. With her legs trying to come together and reject the intruding object, it started to become problematic for the girl actually trying to "teach".

"Neppy Jr, dear?" Iris Heart asked the profusely blushing candidate, "Be a dear for me and hold her left leg apart, would you?" With a nod, Nepgear scooted towards the edge of the bed and grabbed onto Uni's leg, aiding Iris Heart in keeping Black Sister's legs spread apart for easy access to her womanhood. With her privates exposed, there was nothing Uni could do to make the pleasure more bearable besides grab two handfuls of the bed.

"And finally, the main course!"

With a satisfying shlick noise, Iris Heart slid in almost the entire length. As the vibrator fiercely rumbled inside of Uni's sensitive nether region, overwhelming ecstasy passed throughout her entire body and made her toes curl. The candidate's eyes widened and her moans stopped for a moment while her mind tried to figure out a proper response. In the end, that happened to be just one thing: Shout.

The Black Sister shouted with unrestrained fervor as the lewd toy wore down her sanity with unrelenting pleasure. As she was practically convulsing with ecstasy, Iris Heart and Nepgear had a difficult time keeping the volunteering candidate in place. And yet, despite all the resistance, the purple dominatrix kept playing with her toys- both Uni and the vibrator. With a satisfied, sadistic grin on her lips, she rapidly pumped the fake, vibrating cock in order to break in Uni even more.

Soon, the inevitable began to happen; Uni's womanhood started to twitch, her moans became louder and more frequent, and her tongue lolled out of her mouth slightly. All of these were telltale signs of-

"HYEAAAAAAH~!"

Uni reaching an intense, pleasure-induced orgasm. Her voice rang through the room and her legs quivered as her mind blanked out for a few seconds, her senses only focusing on feeling the bliss emanating from her womanhood.

Nepgear's blushing face began to nervously smile as Iris Heart began to cackle and grin. The dominatrix decided she wasn't finished with her demonstration yet, and so she kept sliding the vibrator in and out of the womanhood that was now gushing with love nectar in order to force the Black Sister to ride out her orgasm. Despite her mind's resistance, Uni's pussy gripped down onto the toy, making it unreasonably difficult for the sadist to keep on pumping the object into her body. Not one to back down from a challenge, especially a lewd one, the CPU pushed the faux length into Uni's tight body once more with a great amount of force.

With one more loud cry of elation, Uni finally began to reach the end of her pleasure high. Her loud moans of body-shuddering ecstasy began to decline into low quiet grunts as the vibrator began to once again easily slide through her body. With a click, the toy stopped its oscillations before swiftly being pulled out by the dominatrix. Now that no toy was stimulating Uni's body, she was able to rest. And rest she did as her torso flopped backwards weakly, her body exhausted from the recent toying that had happened just moments ago. Trying to physically recover from the incident, she began to take deep breaths of the now musty air, the scent of sweat now beginning to spread throughout the room.

Deciding to be brave enough to do so, Nepgear asked Iris Heart a question. "W-What was that step?" She was smart enough to assume that the "main course" that the dominatrix talked about was plunging the whole length in, repeatedly forcing it to go into and out of the raven-colored candidate until she reached her orgasm, but what she was curious about was the whole ordeal with using it after Uni had came.

"That, Neppy Jr," Iris Heart began, "Was step 5: forcing her to ride out her orgasm and feel the bliss of being properly fucked for as long as possible~" The sadist giggled as she brought the fluid-covered toy up to her own mouth before starting to suckle it, tasting Uni's sweet juices as she did so. The woman haughtily giggled once more after withdrawing the toy from her mouth, the length now dampened by Iris Heart's instead. "Hmhmhmm… Delicious~" Without giving Black Sister much time to rest at all, she began to start the next part of her class. "I've decided that I will let you two have your own fun trying out your new knowledge after our next lesson. Now, for lesson 2, I shall be teaching you two lovely girls a little bit about bondage, and a little bit about whipping. Mmkay?" She spoke in a mockingly innocent voice, as if her words were as pure as water. "Now, I'll need a volunteer from the class again. Anyone willing to offer?"

Silence once again filled the room. Iris Heart grinned as her gaze kept switching between Nepgear and Uni, the latter whom had switched back to human form due to exhaustion. Nepgear really didn't want to volunteer this round, but as she saw Uni's hand slowly begin to tremble as it rose up into the air weakly, she couldn't help but call out first. "I… I volunteer, Pluti- ehrm, Miss Iris Heart!" Goodness, Miss Iris Heart felt awkward to say.

Hungrily eyeing up Nepgear's cute, fragile form, the sadist couldn't be anything but pleased at this outcome. "Neppy Jr, I didn't think you'd be so eager for this kind of thing, even more than Uni! Well, I'm sure you just can't wait for the lesson to begin then, hmm?" The candidate, as she expected she would, began to regret her decision. She attempted to start talking, but was quickly cut off by Sadie. "Now now Neppy Jr, you don't need to beg anymore. I already know how you're dying to get this kind of… 'education'." The dominatrix spoke in a sultry, yet teasing voice as she began to materialize the tools she would be using in this second demonstration: a set of handcuffs and a horsewhip with a wide, broad head. With the cuffs being twirled in a circle by her left hand and the horsewhip firmly grasped in her right, she stood up and moved to one of the wide sides of the bed before using a finger to beckon Nepgear to come closer.

Against all of her better judgement, the purple candidate complied with the CPU's call and got off the bed before slowly approaching her. "Y-Yes Plutia?" She nervously asked with a noticeable sliver of fear in her voice.

A sickening grin grew on Miss Iris Heart's face. "Put your wrists together, Neppy Jr." The dominatrix commanded. After the junior hesitantly followed this command and put her wrists close to each other, Iris Heart brought one of the cuffs and closed it with a satisfying mechanical sound, going until it became a snug fit, but not an uncomfortable fit, around the pair of wrists. Then, with some rudeness and force, the sadist caught Nepgear off guard by suddenly yanking on the other end of the handcuffs towards a bed post, nearly making the candidate trip.

"G-Goodness! What was that for Plutia?" Nepgear asked, now scared and wondering what she did wrong.

"That, Neppy Jr," Iris Heart began to monologue as she clicked the other cuff around the closest bedpost, locking the candidate's hands roughly in place, "Was the beginning of your punishment for refusing to refer to me by my name! I'll be thinking long and hard about what I'll have to do to punish you. Now, be a good girl and stay still, or else I'll have to discipline you more~" With the sultry tone in her words practically oozing anticipation, she began to walk to the back of the now bending over Nepgear, taking in the enticing image of Nepgear's bottom being perfectly exposed, the candidate's underwear being slightly damp with her own womanly juices.

"S-Sorry Miss…" Nepgear choked up on her own words before continuing with her correction, the pseudo teacher's current full title being unfamiliar, awkward, and uncomforting to say, "Miss Iris Heart."

"Wonderful. Such a delightful name… hmhmhmhmhmm!" With another sickening giggle ringing out through the room, the dominatrix raised the hand that held her whip into the air. "Remember, this is not your punishment- this is your lesson~" Nepgear began to turn around to see what Miss Iris Heart was up to, but she soon felt what she meant.

The strong sound of a slap pierced through the air as the teacher brought her whip crashing down upon the bound candidate's firm bottom. "KYA!? M-Miss Iris Heart!?" Nepgear shouted out, a tinge of pain present on her voice.

"What is it, Neppy Jr? You agreed to this, remember?" The sadist answered. Nepgear opened her mouth to speak again, but the broad whip cracked once more as it hit Nepgear's butt, causing her words to fumble and turn into a cry of both pain and pleasure. With another quick smack to it, the candidate's butt started to redden and the girl herself began to shout out.

"M-Miss Iris Heart!" Nepgear called out. Her plea only got a giggle and another smack from the dominant sadist. With the candidate now doing nothing else but whimpering as Miss Iris Heart kept up her whip assault, the CPU decided it was time for a change.

"Uni, dear?" Sadie called, bringing Uni to attention, "Observe closely where I hit. You want to try and aim for either the soft part of the buttox," she paused to whip the area on Nepgear's body, "Or the area where the upper thigh and the buttox meet," followed by another smack. "Hitting any higher or any lower could result in injury and pain. While I love to play with my toys like that, I'll be gentle with you two and save that lesson for another day. Now then, Uni, would you like to show the class what you've learned so far?" As she spoke the final words of her sentence, she materialized another vibrator, this one being flared at the end, and a remote control for the device before offering them to the Lastation candidate.

Uni nodded before slowly moving off the bed, having now recovered from the earlier incident. With a bit of hesitation, she took the whip, vibrator, and remote from Miss Iris Heart and proceeded to approach her partner. Nepgear was shivering in an odd mix of both pain and pleasure and her anticipation had turned liquid, some of her juices dribbling down her thigh now.

"W-Wait, I'm not getting a break?" Nepgear asked with nervous concern audible in her voice.

"Of course not, Neppy Jr. This is your punishment!" The sadist responded before turning to Uni. "Now Uni, the whip I gave you is a broader whip. Because of its larger head, it'll provide more of a spanking feel, but it'll still give Neppy Jr here the feeling of being whipped, and you the feeling of whipping someone else, slowly breaking them down and reddening their ass, marking them as your toy… hmhmhmmmm…" Miss Iris Heart giggled for a bit before receiving a confused, slightly scared face from the raven-haired candidate. "In addition, the other toy I handed you is remote controlled, so all you have to do is shove it up one of Neppy Jr's holes and turn it up to whatever sensitivity you want her cute, fragile body to feel while you do as you please with her ass, mmkay?"

Uni was, more or less, put off by the CPU's sadist tone and choice of words, but she decided to roll with it and continue. With Nepgear giving Uni a face pleading for her to be gentle, Uni got to her knees and began to pull the other candidate's soaked underwear down before raising the moderately sized vibrator up to her womanhood. Slowly and gently, she started to press the currently disabled toy against Nepgear's already wet and eager womanhood. The lilac-haired sister lowly whimpered in a quiet show of excitement as Uni put pressure on her womanhood with the toy before finally,

"Ah… Eh… HYAAH!"

The vibrator slipped in. Not wanting to rush the situation, Uni savored Nepgear's moans as she slowly pushed more of the fake member into her, eliciting as much noise as she could from her bound partner. Eventually, the length finally reached the flared ending, becoming flat and running parallel to Nepgear's butt. With a look of almost sadistic satisfaction on her face, Uni pulled the candidate's panties back up to ensure that the vibrator wouldn't loosen itself somehow. Turning her attention to the remote, the newly dominant candidate looked at the four settings: OFF, LOW, MED, and HIGH. Deciding to be at least somewhat gentle and ease in her partner, she began to hover her thumb over the LOW button. Her normal passiveness and tsundere tendencies made her hesitate for a few moments before her newfound sadism took over her actions. With a desire to dominate Nepgear ruling over her, she moved her thumb downwards before firmly pushing the MED button.

"U-Uni, what are you- HYEEEAAAAH~?!" Nepgear, not having anticipated the intense pleasure the vibrator was giving her, moaned with a high-pitched shout. Uni licked her lips as the lilac candidate squirmed, her ass swaying in the air as she bucked her hips. Needless to say, Nepgear showing her soft bottom in front of Uni only enticed the girl in charge. As Nepgear closed her eyes in a barely successful method to survive the surges of pleasure the buzzing toy gave her, Uni slowly wound her own arm back before quickly lashing it forward, causing the whip she held to collide into bound girl's ass. The swift, painfully enjoyable action earned the candidate a surprised and energetic moan from Nepgear.

Eager to continue after being further motivated by the sight of Nepgear's legs shivering, Uni drew her whip back before lashing out again. And again. And again. She entered a steady rhythm of whipping the purple sister, gradually speeding up as time went on. As the lashes started to come quicker, so did Nepgear's moans. Eventually, Uni's pace grew to such a brutally fast speed that her partner's jaw hung open, continuously shouting out in ecstasy as she enjoyed a constant flow of stimulation. Wanting to make Nepgear not just reach an orgasm, but reach the orgasm, one that would taint her mind to only think of being pleasured and used and- Goodness, Uni was starting to become sadistic! Regardless, the candidate still held the remote in her left hand and, as she kept whipping with her right, pushed down on the HIGH button.

In response, Nepgear shouted out her partner's name at the top of her lungs, her cry likely echoing throughout the entirety of the Planeptune Basilicom. "UNIIIIIIII!" Moments later, her legs shuddered wildly as her womanhood began to gush out juices. The candidate had been brought to her orgasm. Wanting Nepgear to ride out the pleasure high, Uni continued to stimulate her by continuing to whip her. With each stroke of her hand, the dark colored candidate brought a painful sensation crashing into Nepgear's butt.

A minute or two passed as Uni kept up her cycle of whipping the candidate, letting the vibrator jostle around in her womanhood at the same time to ride out the orgasm as long as possible before it finally came to an end. Satisfied with the work she had done and growing tired of Nepgear's now few and quiet moans, Uni switched the vibrator to off before approaching her partner. With a smug, pleased grin on her lips, she gazed at the fluid trickling out from underneath the candidate's panties and down her legs. Moving to finally get Nepgear out of the compromising position she was in, Uni pulled down Nepgear's panties and removed the vibrator before standing back up and undoing the handcuffs around her wrists. With a sigh of relief, the freed purple sister collapsed to the ground where she proceeded to fidget slightly in an attempt to cope with the overwhelming orgasm she had just experienced.

"Enjoying yourself, Uni?" The sadist rhetorically questioned. After receiving a nod from the still sane candidate, Iris Heart smirked and snapped her fingers, beginning to materialize some objects. "Wonderful. Now that you're finished with Neppy Jr over there, it's time for us to move onto our last lesson for today. In our third lesson today…" The "class learning material" she was summoning finally appeared, gently falling into one of her hands. Proudly on display was a double sided strap-on, each side being the same medium length, and a few coils of rope to play around with. "We will be using rope and strap-ons. Now, lift your hands up, Uni."

With a nervous blush now growing on her cheeks, Uni's dominate demeanor almost instantly disappeared. She let out an audible gulp before obeying the dominatrix's command, raising her arms above her head. Sultrily smiling, Iris Heart tossed the strap-on aside and quickly approached the concerned candidate. With swift hands, she began to tie up Uni. She first bound her wrists, followed up by binding her ankles, and finished by taking a softer and thinner rope and wrapping it around her face, effectively blindfolding the black sister.

Uni was about to complain about what Iris Heart was doing, but just before she gained the bravery to speak up she was quickly scooted over to the bed before being pushed onto it, landing with her stomach facing downwards. What happened next was completely hidden from her vision, leaving her only able to listen to what was occurring. A sense of fear began to warm over the girl as she heard the sounds happening beyond her sight: First, the rustling of the sheets next to her, then a quick, subtle yet distinct schlick noise, and finally a clicking noise. Soon after those sounds, Uni felt the bed rustle once again before two gloved hands gripped her hips. It didn't take a genius to figure out that Iris Heart was just about ready t-

"YAAAAAAH~!?"

Just about ready to shove the other end of the strap-on into her. With no mercy, the sadist had thrust forward and pulled Uni's hips back at the same time, resulting in the fake member quickly bottoming out inside of her womanhood. "As you can see, Neppy Jr," Iris began to inform as she pulled her hips back in preparation for another heavy thrust, "The feeling of being completely helpless is a feeling that some people particularly enjoy." She broke up her speech by thrusting forward once again, letting out a soft moan while she pulled back for the second time. "In addition, blindfolding the taker can work to great effect. Lucky little Uni here can't see a thing, so she's focusing more on her other senses; particularly hearing and feeling. Since she's more focused on feeling…" She thrust forward again and began to settle into a moderate rhythm of movement, eliciting an even louder than normal sound from the candidate's lips. "The pleasure she feels is intensified. Multiplied, even!"

As Uni proved Sadie's point for her, the CPU stopped talking and focused only on pleasuring the girl beneath her. As Nepgear watched, she took in the sensations of the event occurring before her. The room smelled musty and sweaty, the air was continually disrupted by either the soft slapping noise caused as Iris Heart brought her hips into Uni's, the dark candidate's pleasured moans rang into her ears, and last but not least of all, Iris Heart abusing Uni's defenseless, helpless womanhood as the sister was all bound up.

In some vain act of resistance, Uni tried to raise her legs up. The sadist had planned for that. Swiftly and with experienced positioning, Iris Heart placed her legs on top of the back of Uni's, punning the girl's limbs down and therefore halting the candidate's disobedient body movements. Teasing her student whom was writhing in pleasure, Iris Heart leaned over to press her sizeable breasts against the bound girl's back before speaking. "Now now Uni, no need fidget so much. Just relax and enjoy the ride~". After cooing into Uni's ear seductively, the dominatrix gently bit it before raising herself off of the candidate, pulling her breasts away as well.

Kneeling upright, Iris Heart tightly held onto Uni's waist. Miss Iris Heart felt pleasure swelling up in her body, and she wanted to please herself as much as possible. As she felt her own orgasm beginning to come close, she also observed how Uni's legs shuddered and shivered, signalling that she was close as well. Without warning, the sadist instantly shifted her pace from a flurry of vigorous thrusts to a slow, methodical rhythm of pounding. Just as she did that, both girls reached their limits. Uni's jaw hung as her mouth stayed agape, moaning as pleasure burdened her whole body and her juices began to slicken the strap-on forcing itself into her small frame. In contrast, Iris Heart hummed happily as she kept thrusting, each and every movement, however minor, jostling her end of the toy around in her insides and sending bursts of pleasure into her as well.

Finally, after what seemed like ages of intense, fervorous fucking, Iris Heart came to a stop. As she pulled the strap-on out of Uni's drenched womanhood, she gyrated her hips as to hit as many sensitive nerves as she possibly could. The candidate's body twitched occasionally, showcasing how broken she was to the two girls watching her.

Still bound and blinded, Uni was almost clueless as to what was happening in the room. She heard the distinctive clicking noises of the dominatrix's high heels as well as the subtle noises of Nepgear's feet as the two shuffled about the room for a short period of time. The bound girl listened closely after the two stopped moving, doing her best to try and overhear the two other girls talking. Unfortunately, Iris Heart had dropped to a low whisper specifically so that Uni couldn't hear. She was left with no other option but to struggle and squirm on the bed while trying to listening to the others. Suddenly, a beaming was heard and some light even managed to pierce through the blindfold, yet still not granting any vision for the brief moment it flashed.

Soon enough though, a now recognizable cycle began again: The bed rustling near her, another schlick noise- joined by a gentle moan this time- followed by a moderate click sound. Delicate hands gripped Uni's hips, the person whom just laid down on top of her clearly being Nepgear- presumably in her Purple Sister form? The candidate didn't have much to think about it before she felt a familiar length prodding at her aching, still sensitive womanhood. Just as Uni opened her mouth to try and speak, she once again felt the thick, fake member penetrate the eager folds of flesh of her womanhood, causing her to moan out.

Rather than be slow and deliberate with her actions, the lustful Purple Sister wasted no time in pulling back and pushing forward. The two candidates made a symphony of moans as they intercoursed with each other, each of the transformed Nepgear's movements stimulating both of their nethers. Weakly, an overwhelmed by pleasure Uni called to her partner. "N-Nepgear!" She gasped out with difficulty, the transformed sister's intense, passionate pounding making her have trouble speaking properly.

"U-Uni…!" Nepgear mewled as she kept quickly slamming her hips into Uni's. A quiet giggle came from the dominatrix teacher as she watched on, however it was drowned out by the loud moaning, mewling, and hips slapping together.

And soon, those loud moans temporarily faltered as Uni began to sputter out words. "Nep… gear! I'm… gonna…!" The candidate needed to say no more as her partner understood exactly what she meant. Uni neared her orgasm because of the intense stimulation she had received already only making her feel more sensitive. Nepgear, in contrast, neared her orgasm so quickly because of her eager body being so pent up from watching Iris Heart "teach" Uni. With one final forceful thrust, the Purple Sister satisfied both of them at the same time, causing both of them to yell out loudly in ecstasy as their minds could only think of the overbearing sensations they felt as well as causing their sweet womanly juices to gush out of their bodies, coating both ends of the strap-on in their love nectar. The two girls both grinded together and rode out their orgasms as long as they possibly could.

Eventually, their pleasure highs stopped, letting the candidates fall down onto the bed in exhaustion. Out of energy, the Purple Sister shifted out of her HDD mode and back into her human form. As they lay on the bed, they did nothing but twitch and writhe in the after effects of the wonderful feelings they had taken as well as breathing heavily, taking in much of the sweaty, sex-smelling air.

Iris Heart on the other hand acted much more casually. With a snap of her fingers, all of the toys they had been using- the vibrator, strap-on, handcuffs, and ropes- all dematerialized, leaving only the two girls on the bed, their faces warped by pleasure in the form of their tongues lolled out and their eyes having raised and rolled back. She giggled before calmly speaking to her pupils, "Well girls, I hope you enjoyed 'class' today. If you're ever interested in more, I'm a teacher who is always willing to help her students learn with rigorous academic work. Goodbye~" And with that, the teacher ended her class for the day, leaving the room and closing the door behind her.

She had a confident feeling her students would want to try and get some "extra credit" sometime in the future.