Oto, a little sister who tends to skip school, is a lesbian who is in love with her older sister Machi, a kind and good student. The two fall into a forbidden incestuous lesbian relationship... Unable to refuse Oto's invitation, the older sister licks her younger sister and loses herself in the excitement of her first experience... The pleasure of immorality, the sisters' secret garden, the beautiful and erotic lesbian sex that indulges in taboos transcends the barrier between sisters... The classic lesbian scene, the sisters' aesthetic kisses are intoxicating...