"What do you want?" Sam asked eventually. "Just wondering about what I'm going to do about you," Lucifer answered. "Are you going to kill me?" At that, Lucifer just snorted. "Don't be stupid. You're as good as dead already. I couldn't kill you even if I tried." Then he smirked. "And let's say I could kill you, where would be the fun in that?" (Cage AU, samifer if you squint)

Sam realizes his hallucinations of Lucifer are real, Dean thinks his brother is insane, and Lucifer is freed from the cage a second time. (Hallucifer fic. Samifer.)

Dean's feelings for Castiel began to intensify the moment Anna brushed his handprint. Features Hell flashbacks, nightmares, and the beginnings of Destiel. Canon-abiding. 04x10 "Heaven and Hell"

Sam Winchester is a teenager who just wants to go to school with Dean and attempt a normal life. He never factored in sharp eyed Gabriel for a best friend or his strange brother Castiel, and with Dad becoming more and more violent and his nightmares getting worse, Sam has no idea how he's going to hold up his hastily balanced house of lies... slowburn Sabriel, Sam-centric, Destiel.

Really short Samifer hurt/comfort. Sam doesn't remember everything what happened in the cage.