They could totally make a series out of this, but yeah the 'random' of who's dream he is in wouldn't work - perhaps it is all about the other person thinking of him so he hasn't realised it - I mean thus far it is his seemingly best friend, and the girl that likes him, so maybe his power is his consciousness jumping into the dreams of those dreaming about him?
Could see a comedic escalation of him appearing in more of her dreams with the events therein getting lewder as time goes on, with him thinking he's freakishly obsessed with her and her freaking out about her obsession with him while they both try to play it cool but fail