Looking for Yaoi Manga

Hello! I'm looking for a manga (again) where there is a boy who lives with his roommate. Anyways, the boy is a loser and even his own roommate thinks he's a loser. The roommate brings over a cute guy (to screw) and the loser boy heads out bc the roommate is gonna screw the guy. But as the cute guy greets the loser boy he feels actually compelled to him and finds him cute because he looks pitiful. He describes it as being a pitiful type of cute. Later on, the cute guy and the loser boy get into a relationship but it's not a healthy one because the cute guy sleeps with everyone. Well idk if the cute guy is considered cute, he just sleeps with everyone or like it's his job. This was also probably a side story in a manga but idk. Thanks in advance if you can help me find it!