what's the name??

there's a manga where the two guys who live together have threesomes with women, but one of the guys always stares at the other during sex. They decide to just have sex with each other. And the dark-haired guy we learn first had sex with a college student, his first love, and she ended up pretending she didn't know him when she got a boyfriend. The light-haired guy, has an issue with being obsessive over his partners, and they always break up with him because of it. The blonde guy and dark-haired guy do end up dating and the last chapter is of the blonde guy video calling a friend and saying he can't wait until the dark-haired hugs him from behind and says "I love you". The dar-haired guy hears him and hugs him from behind.