Exclusive actress "Nagatani Rui" seduces her sister's boyfriend. While being attacked by a mugger on a dark street at night, she falls in love with the man who saves her. Upon returning home, she finds her sister with that same man. Unable to give up, she starts using every trick in the book to seduce him. She barges into his workplace and makes a bold appeal with her body to win him over. One day, their relationship escalates to the point where her sister finds out. To confirm his wavering feelings, a tug-of-war between the sisters ensues...
