my incest is out! Kindan-o (a marriage between an older brother and a younger brother) and the mother-in-laws

incest insertion! the stimulus amplified by a sense of doomedness sticks into the back of the uterus! A mother of disgrace and shame for her son's body! A widow who seeks sex even to her husband's brother! 5 episodes of the forbidden Shonai Seiko story are included!