Targeting his mother's afternoon nap, the younger son sneaks into Sayo's futon to cuddle up. A mother complex defines him, his dependency on her having become an everyday habit. One day, after Sayo steps out of the bath, she realizes her underwear is missing. Convinced the younger son is the culprit, she confronts him—only to find the elder son standing there, clutching her panties tightly. Witnessing the scene, the younger son is consumed by intense jealousy, his mind spiraling into madness. A dramatic tale unfolds within the family, torn between bonds and betrayal, love and desire.