Looking for a YAOI manga

Basically, story starts out with a guy doing the main character. Then they finish and mc’s little brother shows up. The other dude tells little bro that he’s mc’s lover and bro flips out saying to take him instead. Mc leaves and tries to pick up someone else. He’s basically known as a slut in the *nichoume* district (think that’s what it’s called). He’s known as a super perv that lets you do anything. Bunch of guys start crowding around him trying to smash and he tells a dude that if he gets hard from sucking on fingers he’s basically a bitch. Then, light haired dude shows up and is like “what about me”. He later says that he was just trying to help mc our of difficult situation and they end up having vanilla sex