There are a few ways this could go, but the most obvious one is that the MC has to break up with Diane and move out. Since he no longer appears to even like Diane, and disparaged her several times in this release, the question is CAN he move out to somewhere other than directly to Christine's place. If he does that, it's pretty much game over. So, what obstacle(s) can the developer throw his way?
I wonder whether there's even any chance of salvaging anything with Diana at this point. Even if the MC would ever actually confess missing affection directly to her, would it really make a difference? She doesn't seem to consider anything but herself, she seems tired of life in general (and so by extension, the relationship as well), and affection doesn't seem to be something that comes to her naturally.
So, then, like you ask, where do we go from here? If Diana were not who she is, I'd guess one possible obstacle could ofc be that she realizes what's happening and decides actually to try in the relationship and get them both to some place of affection and a way forward. Given her personality, though, I don't see that becoming an obstacle to moving out.
I suppose he could get some type of injury and be bedridden for awhile. Maybe he walks around a corner and — bad timing — runs into a windmilling Belle who throws him into traffic or something.
He could also be offered a promotion as some kind of "sales abroad" representative for the company, but Christina is the same distance as Diana basically. So that wouldn't let a relationship with her develop.
Maybe Diana learns she has some illness, making the MC second-guess whether he would want to stay with her. (Is it really the time to abandon her?) But given that he says he has "no regrets" about the kiss... I have my doubts on this one as well.
Maybe Diana can just throw chairs at the MC as he moves to leave. If he can Donkey-Kong them decently, only then can he actually leave.
