Looking for Yaoi

I asked a few days ago but didnt get an answer so I’ll ask again with more details that I somewhat remember..

So high school part time student working at restaurant got caught by science teacher but their school doesn’t allow part time workers. Teach kept the secret for student and student got attached to him I guess and started going to the staff room/science lab a lot and kinda fell in love with him. Student finds out teach is gay and has a crush on his high school/college friend and was jealous and stuff. I remember they looked at stars together.