Dirty Docking!

Matsu's parents are working overseas, so he stays with his tsundere childhood friend Yuki and her gorgeous mother Yasuko. Yasuko is kind and caring, but Yuki is a roughhousing dark-skinned kogal prodigy who loves to assert her iron will on Matsu. Despite the constant tussles, Matsu finds himself pressed against her plump thighs and big bust.

After a particularly intense fight, Yuki notices Matsu's arousal and mocks him, claiming his only talent is perversion. Matsu calls her bluff, and they begin a heated physical contest to see who excels in bed. Their encounters are far from discreet, and soon others take an interest in testing Matsu's abilities.