Widowed and left sexually unfulfilled, the beautiful mother, Chisato Shoda, had devoted all her love to her son—the living image of her late husband. But one day, seeing her sleeping son with a throbbing erection, she could no longer suppress her overwhelming desire. Her pent-up lust as a mature woman spirals out of control, caught between maternal love and guilt, yet driven purely by raw craving, she ends up crossing the line with her own son. This shocking tale of forbidden mother-son intimacy unfolds in intense, taboo passion.