Married life arranged by her parents. On the surface, they appear to be a calm, ordinary couple, but in reality, Miho has been suppressing her intense masochistic desires. Recalling her former lover who completely dominated her with sadistic training, she spends her nights drowning in masturbation. One day, unable to endure it any longer, Miho resolves to meet her ex-lover again. Though guilt over betraying her husband torments her heart, her uncontrollable lust drives her forward. Her days filled with secrets are about to take a new, twisted turn.