A serious sister working in Tokyo has a younger sister with big breasts move in, who seduces men and even goes to her sister's workplace, quickly becoming popular. Even the man her sister had her eyes on is drawn to the younger sister. The annoyed older sister sets up her younger sister to be raped by an old pervert while she's drunk. The old man is thoroughly satisfied with the big breasts. After that, the sisters are toyed with by men driven by lust.
