After seeing her husband off to work, mother Satsuki heads once again to her son's room. There, she finds his morning wood straining against his pants, rock-hard and impossible to ignore. With a melting expression, Satsuki rubs her cheek against his bulge, then runs her tongue over it, savoring the sensation. Using her son's erection as her arousal trigger, she becomes deeply absorbed in masturbating—yet just as she prepares to taste him directly, her son suddenly wakes up. Unable to perform her usual morning ritual of sucking his hard-on, Satsuki finds her lust uncontrollable, leaving her unable to focus on household chores. Finally, while her son naps, she reaches toward his crotch, surrendering to the warmth that awaits her.