Shihai no Kyoudan

The protagonist is suspended from school for a crime he didn't commit, thanks to school manipulation. It's not a severe punishment—he was already a delinquent—but teacher Kotomi regrets not defending him and wants to make amends. A dark fire ignites in his heart. Older teachers possess a charm schoolgirls lack. He has a complex about female teachers and a desire to bring them low. Seeing the perfect opportunity, he exploits Kotomi's weakness, issuing lewd orders. Thus begins the drama of taming teachers and painting them white.