51-year-old Chizuru attended the wedding of an acquaintance's son, and driven by deep love and anxiety for her own son living alone, she takes the drastic step of personally handling his sexual needs. This twisted affection gives rise to a forbidden mother-son relationship, tinged with melancholy yet possessing a shocking allure. Straddling her son, Chizuru's face writhes with abandon as if pushing herself away, yet it radiates a purity and sincerity of pleasure like no other. Her figure embodies a strange beauty where the abnormality of love intertwines with a mother's passionate devotion.