Incubus M by flamefics

Wu Fan isn't sure if it's a dream or not, but if it is he's definitely not sure if he ever wants to wake up. There's a stranger in his bed and he's not entirely unwelcome.

Basically Kris is dragged to a night club by friends and gets far more then he banked on. There is actually a chaptered sequel to this, but it's not finished yet. Heads up, the Panda totally tops the dragon in this one and its great.