When Tatsuya returns home, he finds his mother Tsubasa captivated by a dance routine on TV that promises weight loss results. Despite her age, she fearlessly throws herself into the dance without hesitation. Tatsuya scoffs at her, yet can't help but notice her breasts swaying rhythmically and the soft, overflowing curves of her buttocks spilling out from her leotard. Tsubasa's sensual hip movements gradually erode Tatsuya's self-control until he can no longer resist, pouncing on her like a wild beast. Caught completely off guard, Tsubasa is left stunned and powerless, forced to submit to her son's overwhelming advances.