is it this? http://www.mangago.me/read-manga/yugami_hajime/
Thank you but that's not the one.
Joining ~
Joining ^^
Oh I found it...it was there in my list but if forgot to tag it.
It's this one :)
http://www.mangago.me/read-manga/bed_room_tour/an/bed-room-tour--chapter-4.html
Thanks to those who tried to help.
There's this fucked up story I read and it was a oneshot part of a collection. This dude is a high schooler and a trouble student and his parents are dead. His sensei does his best to help him out and they are in a relationship. The teacher later comes to know that the dude is messed up in the mind.
The story ends with them having sex in the infirmary and some teacher sliding the curtains...indicating that the sensei's social life was over (considering he was having sex with a minor and a student at that)
Thanks
If it helps, the student was the seme and the teacher was the uke. Also the teacher did not know at first that the kid's parents were dead. They died in a fire if I remember correctly.