After giving birth, Mariko's sensitivity heightened, awakening stronger desires. Mariko, a married woman, accidentally exposes her braless figure to Shinji, the male student living next door. What begins as a playful tease gradually transforms into an irresistible attraction for him. Overwhelmed by intense passion, her breasts leak milk even through her clothes, drawing Shinji deeper into her allure. Her fiery seduction soon spreads to Shinji's male classmates, igniting a new whirlpool of lustful desires.