Derek wakes up on the couch to a mouthful of hair, a warm weight against his chest and something holding on to his waist--all it takes is a deep breath to let him know that the person who is aggressively cuddling him is Stiles.

They must have fallen asleep while watching another Buffy the Vampire Slayer rerun and drifted towards each other. It's not that unusual for them to find themselves in this position, so Derek only closes his eyes and, if he cuddles Stiles closer, no one needs to know.