This dude is a 50 year old bachelor teacher (with a long job career), who lives in some cheap apartment, he doesn't have any hobbies/expenses of any noteworth, and we're supposed to believe that he's dead broke, without any savings or money?
How much are teachers paid in that school?? What's the point of being one, if you are just a poor person, always working, and having 1, ONE holiday per year..? And let's not forget that before those monster girls, everyone was always openly disrespecting him.
I would either do a career change (&change of city), or I'd just shoot myself in his position.
But yeah, I can't deal with this crap. I'm out. My 1-10 score for this is 5/10 (I think the monster children are cute, before their transformation into human forms, for that I give this +1 points, otherwise I would've given this 4/10)