Hi everyone, I need help finding a yaoi manga I read a long time ago.

A high school boy (I think) who is in love with his uncle (uncle might be a teacher/tutor). Not sure if it's his real uncle or maybe a friend of his parents (parents might be yakuza or rich?). The scene I remember the most is the boy confesses in a car and the uncle does sumata/between the thighs because the uke is underage. I think somewhere in the manga the uncle says something along the lines of "your dad's going to kill me".