Nami Suzuna plays a stepdaughter who experiences four years of conception and depravity. Living under the same roof, she is entangled in her stepfather's quiet obsession, unable to refuse as she offers her body to him day after day. At first, her stepfather's penis is painful, but with repeated penetrations, it gradually transforms into an indispensable "poison" for her body. In between housework, or in the bedroom late at night, she stores her stepfather's seed in her uterus and blossoms as a woman. At the moment she finally realizes she is pregnant, her eyes are a mixture of despair and ecstasy. A cruel record of parent and child that paints the portrait of a family over with pleasure.