wait , are you talking about the one where the guy tried to cut off his hand?at the end he became mentally ill?
no, it's not it!
this happens here (oneshot, first story):
http://www.mangago.zone/read-manga/shibararetai/mrs/manga/shibararetai/v-1/1/85/
yeahh!!! that's it!! thank you so much ε=ε=(ノ≧∇≦)ノ
ヾ(^ω^*)
hey guys, i'm looking for this historical yaoi manga about the young master who likes to go to the brothels. but then he fell in love with a sensei. because he must succeed his family business he couldn't met the sensei. when he tried to met the sensei, the sensei disappeared. after that he became sad and sick. then the sensei appeared as his personal doctor. sorry for the lack of information and sorry if my english is bad