The Goddess wanders the hallways of Chaldea and wonders what to do. This situation is quite new to her...after all, before now, it is only men who have fallen for her charms. For a woman, let alone her Master to display such an inclination...is interesting indeed. “But, in this situation...I wonder what I should do...”

So the Goddess wonders and wanders, and considers asking for advice. “If I recall correctly, that big sister of mine might have some experience with this kind of situation...”

“...But no. I do not feel like asking her. I do not feel our relationship is back to the same togetherness we once had, and...I worry that I might slip back into my old ways if I get even a little annoyed with her...and thus break my promise with my Master.”

“No. I cannot ask her. I need...someone else.”

So the Goddess wanders and ponders some more, and finally figures out the perfect person. And so she looks around for a certain fox-eared maiden with (self-proclaimed) expertise in such matters, currently visiting Chaldea from another far-off place, and finds her in one of the lounges, emanating an aura that the girl would have already known of the Goddess’ inquiry. And so the Goddess asks the girl for what she thinks the Goddess should do, and the girl answers:

“Well, if you’re unsure if her feelings for you are what you’re considering, then ya have no choice but to test it out! Try to charm your girl, and see if it sticks! And if it does, then maybe…” *whisper whisper*

“I see. Then that is what I shall do. Thank you for your advice, fox-pretender maiden.”

"Don't mention it, sharp-tongued snake goddess!"

And so the Goddess goes to find her Master.

“Oh, Master, have you a moment? There’s something I’d like to ask you.”

“Y-Yes, my Goddess! Anything you need!”

The Goddess shines a blazing, brilliant smile at her Master, her eyes softening into an inviting gaze. *Siren Song cast*

Her Master’s eyes glaze over just slightly, and a smile appears across her face, completely at ease. A slight change from her earlier just slightly flustered state.

“Oh my. So it worked. Normally it would only work against easily charmed men, but...I see. So there might be something after all.”

“...Master, just what do you love about me? Is it just my beauty, my appearance?”

“I...”

“I do think you’re pretty...nay, beautiful...an utter Goddess, literal perfection...but...”

“I also...love your elegance, and your voice, and the colour of your eyes...”

“I see. So not much more than superficial things. Then-”

“...And I also love that you never care much what others think, and do what you feel like no matter anyone else. I love the tomboy side of you as much as the elegant side. And I...love your devotion to your sisters, staying by them even unto certain death, never abandoning them, even if your tongue towards your elder sister grew sharper over time. And how you would even give up your own wish to the Grail for your sister’s sake...”

The Goddess blinks in surprise at this continuation. What is this strange feeling ignited in her own chest at those words? Why has this strange human seen so much of her, and still feels this way? The charm has not faded. There is no way these are lies coming out of her mouth. This must be the truth. Even the Goddess’ most guarded secrets seem visible to this person in front her. And yet...there is a strange warmth to that realization.

Is this feeling blooming in the Goddess’ heart...*love*?

Having heard enough, the Goddess frees her Master from the charm spell.

“Huh? Wha- What was I-”

And the Goddess leans forward, and pulls her Masters surprised face a little closer, and…

...plants a small kiss on her Master’s cheek.

“A small thanks for your help, Master. You have been most helpful.”

Her Master’s face goes bright scarlet as soon as her mind catches up with the situation, and she falls over backwards, her eyes rolling upwards as she faints, her mind completely overrun by the sudden display of affection, like being hit by a freight train out in a fog.

“Oh my. What a useless Master this one is. I had better go get the glasses girl. It would be a problem if my Master got hurt from this. But that advice from the so-called "Schoolgirl" indeed turned out be quite useful...”

And so the Goddess leaves, with her Master sprawled out on the floor of the hallway, her subconscious mind reeling from what had just occurred. A few moments later, a reliable kouhai comes, informed of her senpai’s whereabouts by the Goddess. She carries her Master to her Master’s room and lays her on the bed to rest away the shock.