The Cooliest's manga / #Ex-Student(2)

Guy breaks up with his lover and ends up homeless in the park and gets found by an ex-student of his when he was a coach.

Ex-Student becomes a teacher to meet with his ex-teacher whom he has had a one-sided crush on for so long. On the night of the welcoming drinking party, said ex-sensei got drunk so he brought him to his home where he attacked him basically.