Sekiguchi Rino, consumed by her forbidden love and desire for her stepson Makoto, can no longer suppress her urges. Witnessing her actions firsthand, her biological son Minoru trembles with rage and confronts his mother, only to reveal a shocking truth—behind his anger lies his own desperate longing to be loved by her. Stunned by this confession, Minoru draws closer to his mother, and the two begin forging a new, twisted bond. A story where deep maternal affection intertwines with hidden, dark desires.