Tomoya's mother, Kiyono, has been a longing for Atsushi, a key kid, since she was a child. Atsushi happens to see the scene where his father, Kenta and Kiyono, are kissing. Tomoya invited me to go to the Kanzaki family as usual, but Kiyono was just awkward ... Meanwhile, Tomoya is late for the promise and heads for the Kanzaki family alone ... There was no reply when I called out, and Kiyono was masturbating when I entered. Atsushi who has seen Kiyono's woman attacks unbearably. Atsushi, who couldn't control his desires, blamed Kiyono with his own hands, and Kiyono gradually became a captive of his desires ...