One day, when Takeru goes to the Hashida house to borrow a fishing rod, he notices the nipples of married woman Toshiko showing through her floating bra. Takeru, who has had a crush on Toshiko for some time, becomes excited by her exposed nipples and stares at them. When Toshiko notices his gaze, instead of hiding them, she shows him her floating bra as if to seduce him. Takeru can no longer resist Toshiko's actions...