The virtuous mother Mai Fuyuki lives a quiet life with her timid son. But one day, her son's childhood bully—a so-called friend—pays an unexpected visit. While idling away time in the boy's room, the two young men prepare to leave as usual with innocent smiles, until they notice Mai cleaning the bathroom. Drawn to her mature, alluring body, their youthful, rock-hard cocks instantly react. Overcome by sudden lust, they pounce on the mother. Again and again, she is violently penetrated and raped. And the most horrifying moment comes when it all unfolds right before her son's eyes. The woman is exposed in the worst possible situation—forced to climax against her will in front of her beloved child. This shocking climax defines the essence of the film.