This manga is going too fast on the hentai stuff and not so much on the storyline. Their stories are hinted a little but not elaborated like how the ML suddenly liked the FL because she continued studying despite being bullied about it? Then there's the part where FL suddenly went AWOL on ML after graduation.. like, their story doesn't make sense at all. Plus the rape part of it all.. it's literally rape when you shove your co-worker and undresses them and toys with her body when she clearly doesn't like it.. then the whole situation with the female student who said that FL ruined her life.. how? when? why? and her solution was to make her classmates rape the teacher?? why?? and after all that drama, ML just swoops in and yelled to the students and had sex with FL when the students left. He just finished what they started and FL just lets him.
Shukuchoku Shitsu ni 2-ri Kiri ~ Moto Yan Kyoushi wa Sekkusu mo Yanchadeshita