Soreike Iwashimizu

As a boy, Kintaro Iwashimizu once encountered a girl in a bikini sleeping on a beach. At that time, he pulled down her bikini bottom and stamped his family name on her right buttock. Thirteen years later, he can't think about any other girl but her. At the same time, the girl in question decides to look for the one who branded her and make him take some responsibility. A strange manga about strange people.