Since childhood, the younger sister has innocently touched her brother's sensitive genitals. On the night before she moved to Tokyo, she took both his virginity and her own. Now, having returned to her brother as a breakout star in the lolita AV scene, her curiosity and charm have made her a sensation in the city as a Lolita Mistress. Meanwhile, her brother remains secluded in their hometown, consumed by obsessive love and masochistic desires for his sister. This is a strange and shocking story of incestuous attachment unfolding between brother and sister.