Help help meeee can someone help me find the name of a yaoi I read recently? It was about ...

Help help meeee can someone help me find the name of a yaoi I read recently? It was about a student who lives with his teacher who's now is his guardian cuz his dad died and was the guardians teacher when he was a delinquent and the guardian fell in love with the guys dad and wrote the dudes dad a love letter that the dude finds in his dad's closet. The teacher aka former delinquent would bang anyone even the guy teachers and the guys dad/teacher beats up the other teachers and tells h to save himself until he finds someone who loves him.Anyhow the student and the teacher get together !!!