Jun, a mother, was thinking about how she could somehow get her shut-in son Yuzuru to go outside. Meanwhile, Jun witnesses Yuzuru masturbating, and thinks that if he experiences the pleasure of being fucked by someone, he might want her and go outside... Jun strokes her son's penis and relieves his sexual desire. However, her plan goes awry, and Yuzuru, of all people, presses his mother for sex...