Mei Kurose moves into a run-down apartment run by her father-in-law shortly after getting married. The building is home to elderly tenants who have lived there for over twenty years, forming a tight-knit, family-like community. Still in the early stages of married life, Mei struggles to adapt to the strange atmosphere and unspoken rules of her new environment. Soon, the elderly residents begin visiting her home daily under the pretense of stopping by to see her father-in-law. At first, she is bewildered by their bold and carefree behavior, but gradually grows accustomed to their presence. However, her youthful, voluptuous body—her ample breasts, smooth thighs, and pale, shapely buttocks—proves irresistible to them. Sensing her vulnerability, the older men start secretly seducing her behind her husband's back, slowly pulling her into their depraved circle. One by one, they take turns violating her, subjecting her to relentless gang rape and deep humiliation. As the abuse continues, Mei finds herself helplessly drawn into their twisted world, becoming entangled in a web of illicit affairs and forbidden desires.