Oomuro Kou is a guy who has dated many girls but every time he has sex with them they break up the next day saying sex with him is too amazing. That was true until he met an exhibionist, perverted girl named Toudou Haruka who also gave him her first time. It so happens that Haruka doesn't feel like ditching Kou just because sex, but she is a respected oujo in their school and most of her friends and fans don't like the idea of having a guy laying his hands on her. (Source: MU)