173cm tall sister, Ten, and her shorter brothers, Futa and Yojiro. After two years away, Ten treats her little brothers like children, but the brothers have secretly masturbated with their sister's underwear for years because they love her so much. On a night when the three of them slept together in a 'river character' formation for the first time in a long while, the shorter brother's long-suppressed desires exploded, and they engaged in a sandwich sex act to take Ten's body!
