What’s the manga that has the side story (? I think it’s a side story) where two guys ...

What’s the manga that has the side story (? I think it’s a side story) where two guys are sharing a room, and the the ukes name is Aki. The seme will bring girls back to their room and mess around with them but he only messes around with girls named Aki. This is one of my favorite mangas but I’m constantly losing it. Pls help.