Man I know he thinks he doesn't deserve her and yeah, he's definitely right she deserves someone way better than his broke ass, but you gotta resolve this shit somehow.
Idol might as well just end it, pretty sure nobody cares that much. Teacher is clearly a fucking psycho, sure she says she'll "save him" but even if she is genuine when she says that, I doubt she's capable of actually doing it. His mom is fucked because of the old lady and her deadbeat hikkikomori leach. Honestly might need to pull a Welcome to the N.H.K on that dude to set him straight, just leave him alone and see if he makes it.
I know he doesn't want to live but honestly, Chako doesn't deserve this shit. Stay alive and live solely to make her happy and maybe you can justify your own existence because right now, she's the only one who deserves protecting.