Yui's husband is on a solo assignment. Feeling lonely at night, she had an affair with her son's homeroom teacher, but was secretly filmed in the act by her son's mischievous classmates. Threatened with the footage, she is forced to be violated and impregnated near her son. The escalating mischief of the troublemakers leads them to sneak into her home, catch Yui masturbating, and subject her to a milk gun torment, forcing her into submission. Further emboldened, the brats include her son, engaging in forbidden incestuous acts and impregnating her, followed by a continuous threesome of impregnation sex. Yui, too, becomes deeply aroused by the penis, repeatedly climaxing and exclaiming, 'More, give me more!'
