This basically led to him getting bullied, the teachers knew it was happening but didn't know how to stop it, they still believed he did it and they just hoped that if he confessed the bullying would stop. The bullying escalated, and eventually, he found out that he actually had a solid alibi, he tried to explain that to the teachers but they didn't want to hear about it and the main teacher was so stressed that she even slapped him, by the time they calmed down and confirmed that his alibi was actually real, the MC had already manufactured a situation where the rest of the kid would beat him up and as soon as the teachers returned the MC fought back, beat the hell out of the bullies, had the principal involved and confirmed who the real culprit was.