Having reached puberty, Tomoya is troubled by his mother, Yuka. Yuka unconsciously teases Tomoya with her defenseless breasts and panties. Furthermore, her nightly masturbation routine hits Tomoya right in the crotch. Because they live in a small apartment with only one parent, no matter how hard they try to hold back, their moans can be heard... Finally, Tomoya can no longer bear it, and he attacks Yuka, thrusting wildly into her in a frenzy. Yuka climaxes with a sweet cry. However, Yuka continues to thrust, ignoring the sensitive pussy that has just come...