This hentai is based on the manga by Yuuki Seto (Seto Yuuki), Stretta. Linked to other hentai episodes, Stingendo, Accelerando and Ultimatum Sera. She is made for sex. Her whole body is a machine to satisfy any man's desires. She has to have sex every three days to get the vital substances from her partner's semen. However, each time it has to be a new man...