A quiet, unassuming girl named Chisato. With her black hair and black glasses, she carries an innocent, calm presence wherever she goes. But one night, she's pressured by a drunken man demanding to see her breasts. Standing her ground, she boldly strips off her jacket and reveals her large, tightly-constrained breasts. Overcome with excitement, the man can't control himself—he forcefully pulls aside her lingerie, grabs her big tits with both hands, and starts rough, aggressive fondling. Though initially shocked, Chisato grows increasingly aroused, her body responding with wetness and heavy breathing as her desire rises.