After her husband left home for cheating, Hisae was crushed by betrayal and loneliness, spending her days consumed by solitude. Worried about her, her son desperately tried to support and cheer her up. Touched by his kindness, the suppressed loneliness inside her erupted, and Hisae found herself drawn emotionally—and physically—to her son. Unable to bear living alone any longer, a powerful desire grew within her: to stay by his side, never to part, to be together always. Holding onto the belief that she could no longer survive on her own, she deepened her forbidden bond with her son.