After losing her parents and becoming a recluse, the girl 'Ria' learns that her only friend is moving abroad...and she's doomed to be alone. Just as she's about to hit rock bottom in despair, she finds out about custom-made bionic robots. She requests one that looks like her friend's brother, who she had feelings for, and starts having sex with it every day, becoming dependent on it. However, the robot says...'Ria...actually...I'm going to be recalled.' The recluse girl who tasted a bit of happiness tries to face her despair, but...
