I only remember bits of it so filtering by tags doesn't give me much results

Main characters are in highschool, mc is in so much debt that he tries to jump from the bridge but he's seen by his super rich douche classmate (he has a longer lighter hair) when he's walking there with a girl
Classmate takes mc home and offers to pay his debt if mc has sex with him
There might be some other prostitution involved too
I also think that mc has a mole near his mouth