Widow Yuki grows increasingly aroused from the aphrodisiac her son made her drink. Overcome by heat, she begins masturbating in front of her late husband's portrait, but soon gives in to desire and initiates intimacy with her son. Her son, seduced by her voluptuous, soft body, can no longer contain his excitement. Yuki receives cunnilingus as she greedily takes her son's cock deep into her big ass. They passionately enjoy each other in missionary and doggystyle positions, climaxing repeatedly until the final creampie. This film depicts the impulsive, taboo relationship between mother and son.