Part 1: Please Stay

Chapter 1

Dean could feel the pressure of Castiel against him, his angelic strength restraining his demonic power. Cas's eyes going all blue and glowy. He had escaped the dungeon room he was locked in after several injections of demon cure, being close to human, but Cas had managed to stop him just in time, just before he bashed Sam's brains in.

There was a piece of Dean that screamed out, wanting to be human again. Sure, there were parts of him that liked the darkness but he couldn't ignore the voice inside his head telling him it was wrong. Cas was trying to calm him and suddenly he remembered the profound bond he shared with his best friend. He resisted anyway, finding he was unable to think rationally enough to calm himself. But he understood that his friend and his brother only wanted to help. If they hadn't, he figured he'd be dead by now.

Sure his time with Crowley was fun; living with zero consequences. He liked it. Much how Sam liked being soulless. Dean knew he'd have regrets the moment he became human again. But for now, he just wanted the freedom being a demon brought him. Human Dean would never be able to admit his true feelings, always burying things deep inside, not allowing his mind to linger on certain thoughts. It wasn't that Dean had feelings in this form, but he did have raw desire. He was unashamed to admit to himself, that in that moment, he wanted the angel pressed up against him, his angel. These were the thoughts that human Dean desperately pushed away, only allowing them as he slept. He used to dream that he and Cas would become something more. But now he didn't dream. Demons don't dream. And Demon Dean took what he wanted. Now, Dean allowed his thoughts to go to places he previously forbid. And even if Cas was just trying to restrain him, something about the touch awakened a long repressed craving.

Cas and Sam dragged him, struggling and thrashing, back to the dungeon. Cas thrust him into the chair in the center of the devil's trap and restrained his wrists and ankles. Dean winked at the angel and Cas gave Dean a pitying look, ignoring the attempt.

"I always knew you were a kink freak, angel," Dean said, licking his lips with anticipation.

Again, Cas ignored the advance and made way for Sam to approach his demon brother. Sam was holding a syringe of donated blood, just as before. As Sam slid the needle into Dean's skin he struggled against the restraints. Nobody said a word as the younger Winchester and the angel left Dean in dark and silence. Neither one looking back as they closed the dungeon door.

Once every hour, Sam would return for an injection of blood. He and Cas figured they should start over, seeing as Dean had escaped, just to be safe. After all, it had been more than an hour since the last injection by the time they got him back to the dungeon. Part of Dean felt pride that his brother was able to hold him off for so long.

With every dose, Dean would wince and thrash. "You're killing me, you know," he said to his brother after the third needle prick.

Sam was silent for a second, but then he looked Dean right in his pitch black eyes and said, "That's a risk I'm willing to take." He abruptly turned and walked out the dungeon.

On the fourth injection Dean spied Cas hovering near the room's exist. He could see the sorrow in the angel's blue eyes. As Sam left, Cas took his place. Staring at Dean with his characteristic unreadable glare. Immediately Dean felt a rush of emotion, however, he chose to ignore the warm feelings he knew were coming from the injections. Instead he stared back at Cas.

After a longer-than-humanly-comfortable moment Dean spoke, "This may be your last chance to get some demon on angel action, you know."

As expected, Cas continued to stare at him.

Ignoring the human impulse to stop talking before he embarrassed himself, Dean made a kissy face at Cas and said, "You know you want the Double D... Demon dick, that is." He chuckled at his own crude attempt at humor.

Cas didn't break. Instead he looked into his eyes a moment longer before turning and walking away.

The next time Sam came into the room, Cas was again at the door, watching.

"Wait, is this a threesome? No offense little brother but incest isn't really my thing," Dean said with a smirk on his face, remembering the fanfiction Becky used to write. Wincest, was it?

Sam looked at him and shook his head, ignoring the words coming out of his mouth.

"I'm sure we can work out a way to share Cas… after I'm done with him, that is," Dean joked, giving his brother a grin. Sam just stuck him with the needle and walked away, grabbing Cas by the arm on the way out. Once again, Dean was alone.

It only took six injections before Dean's eyes turned back to their usual shade of green. There must have been some left over effect from the last round. But, just to be sure, Dean was restrained a little while longer. Sam kept Cas posted in the room for a couple of hours to keep an eye on him, just in case. Dean looked at his friend, suddenly embarrassed, but not knowing what to say. All that came out was a pitiful "I'm sorry."

Cas stared at him in his typical fashion but finally broke eye contact, looked at the floor and said, "No need to apologize, Dean. You clearly weren't yourself…" He looked Dean in the eyes again, blue on green. "Besides, you took me in when you could have just as easily turned me away. What kind of friend would I be if I didn't return the favor?"

Cas of course was referring to the incident months ago when both of them were still human. Gadreel, an angel who possessed Sam, had advised Dean to ask Cas to leave when he had arrived at the bunker. In fact, Dean had asked Cas to leave but the look of betrayal on his friend's face was too much, so instead he immediately took it back. He asked Cas to stay, against Gadreel's orders. Dean explained the Gadreel situation to Cas, who, after several minutes of intense concentration, decided that it was best for Gadreel to remain inside Sam until he was fully confident he could survive on his own. Of course, neither of them knew it was Gadreel, both believing him to be Ezekiel, at the time. Without Cas's grace he was none the wiser, although he did sense that Gadreel was up to something and advised Dean to keep an eye on him. They ended up teaming up with Crowley to expel Gadreel from Sam's body after learning the truth and losing Kevin.

Dean snapped back into the present as he noticed Cas was approaching him. Cas knelt down and began to examine Dean. In classic Cas manner, he was now way too close to Dean, reminding him of the weeks Cas has spent in the bunker before he had his grace back temporarily. Nothing had happened in those weeks but Dean suspected he was dangerously close to admitting his feelings for Cas. If Cas hadn't left to find Metatron (and Dean to find Crowley), he probably would have. Afterall, Dean had first admitted to himself that he liked Cas as more than a friend when they were trapped in Purgatory together. Although, he tried to bury the feelings as best he could, rarely letting his brain linger on them for more than a moment. Even so, he figured he had fallen for the angel the very moment they met. But he had always hidden those feelings deep inside, never fully able to admit them to himself, imagining what his father would say. His dad was kind of a hardass. But John Winchester is dead, thought Dean, staring back at the angel.

Cas reached up and placed a gentle hand on Dean's cheek, cupping it softly. Dean, flinched away from the touch, reminding himself as he always did, that Cas simply did not understand the implications of human contact. That has to be it, thought Dean, extended eye contact and invasion of personal space don't mean the same things to the angel. But Cas did not back away, instead he turned his attention to Dean's bound arm. He slowly brushed his fingers along the Mark of Cain.

"Does it pain you?" he asked, finally.

"No, but I'm aware of it. It tingles slightly," he sighed. He didn't like lying to Cas. "It occasionally stings... but right now it's fine," he admitted, looking Cas in the eye once again. Cas seemed a bit troubled by the news but returned Dean's gaze all the same. They stayed like this for what seemed like hours, simply taking in each other, memorizing the lines of one another's face.

End of chapter 1