After separating from her husband, mother Ayano raised her son Ryuji alone. Their quiet, peaceful life together was shattered when Ryuji discovered his mother's hidden secret: despite being in the prime of her femininity, Ayano had been suppressing her loneliness by engaging in an affair with a married coworker. When Ryuji uncovers the truth about his beloved mother's infidelity, he is consumed by rage and conflicting emotions. His pure feelings begin to twist into dark desire. Driven by this newfound obsession, he takes drastic action to claim his mother's body for himself. The bond between mother and son teeters on the edge of love and hatred, lust and loyalty, as their relationship spirals into forbidden territory.