looking for a title

it was about a guy(1) who was getting abuse by his father, but he liked being hurt(?) and then so other guy(2)shows up and that guy is a demon(?)vampire(?)immortal(?) idk but guy(1) get into a contract(?). the guy(1) did something bad i guess and the guy(2) wanted to punish him. so guy(2) punishes him by uh using a magic circle, and tentacles came out and grabbed guy(1) and i think guy(2) did *it* to guy(1). thats all i remember from it, details may be incorrect.