I regret reading this. It's even more pathetic than isekai, and there's all kinds of fridge logic problems with the plot. There's something deeply misanthropic and dystopian about the premise, but it's completely ignored. Rather than these injustices being righted or MC being vindicated we get a, "ignore all that and be a good wagecuck!" Last complaint, he never tries to bang the teacher, that's just a wasted opportunity.