Busty student Nanao Satsuki has long crushed on her homeroom teacher. After class, she lures him to a love hotel and climbs on top in her school uniform, riding him in a relentless cowgirl frenzy. She teases him with a titjob between her soft, heavy breasts and keeps grinding until he floods her with repeated creampies—an intensely taboo, passion-soaked after-school fantasy.