I think partially because he (Taiyo) is a problem child himself at the start, he started entering different schools because of being in trouble always.. and so.....
like his parents throw him into that school to help him be better.. But alas!! their child became a victim of bullying and rape.
And also his shitty classmates and even the black haired seme pretty much blackmailed him.
So, he is really in a hopeless situation
All of this shit starting with the Fucking Male Lead... I would be disgusted if in the future he regrets after all of things he did to Taiyo
That last panel... uke looked so broken. I dont understand why he wont switch schools. I mean the classmates are the problem... mostly.