Reiko, an educational mom who has been strictly raising her son Ryota to be a successful person like her husband. However, Ryota's udatsu doesn't go up, and while she's been away from her husband for a long time, stress and libido are accumulating. At that time, when she secretly read an erotic book in Ryota's room, her suppressed sexual desire exploded. Ryota's best friend, Atsushi, who happened to visit there, peeps at her foolishness. Far from scolding Reiko, who is out of Taga from her reaction so far, he fiddles his cock with his instincts.
