Responses
It's the manga "M nano Baka nano Hentai nano?"
http://www.mangago.me/read-manga/m_nano_baka_nano_hentai_nano/
definitely this one:
http://www.mangago.me/read-manga/m_nano_baka_nano_hentai_nano/
Does some one knows a yaoi manga were the seme was bullyed by the uke when they were kids, and he suddenly despairs, but when they grow older they met at school and the seme is a complete masochist?