The fourth installment in the erotic novel series is based on Jun Nagisa's original work 'Cousin's Panties,' starring Ai Asakura! This spring, Mai (Ai Asakura), Shinji's cousin who has just become a college student, starts living at his house. Unable to hide his excitement when faced with her stunning body, Shinji ends up using Mai's panties from the bathroom to masturbate... In this work, Ai Asakura's sadistic character explodes! Enjoy the taboo erotic drama!
