Here's the end of the manga, cbf'd posting pages, don't have em here.
So, shit happens and otaku comes back from home. Misaki goes tries to commit suicide/have sex with her school psychatrist who is the school sempai's husband. Or something, they're related somehow, I forget how. Satou goes tries have sex with the sempai, gets turned away, otaku, satou, Misaki goes to plan a revolution, fails, they go in a house, house starts crumbling, satou saves misaki, they grow up and stop being hikkis.
it's been a while since I read it