Kinda weird that Pizzata took the forced confession seriously, I get he most likely has low self-esteem due to being an outcast and that was probably an only confession he would have but taking advantage of that... still regaining some dignity after that is good, considering whole class has a reason to bully Kitahara.
Think Kitahara also might try to get closer to Kurosawa, so he can't be with Takigawa... after all she could just reject Pizzata in the public and things would be settled.
Looks like Kitahara is jealous of Yashiro of having Yamada as a boyfriend more than whatever she did to her, it's like he was he her love interest.
I don't get why you guys hate Kitahara take vengeance on the bullies and have a clear score in school, girl just wants to be normal, sure she use Kurosawa but he also take pleasure for doing his wank jobs.