Help

I'm looking for a yaoi manga. I don't remember it very well.
It's about a boy (a high-school student?) who lost his parents and he's living with his father's friend (who's also his teacher). The boy's raped by him and they continue to have sex. He wants to escape, but has nowhere to go and then the other man appears (he's also a father's friend) and wants to take him in. The boy considers it, bc he thinks he's just a substitute for his father, but decides to stay.
The father was a painter or sth like that.

Does it ring any bells?