Yuu's sexual desire is building up as her workaholic husband doesn't pay her any attention. Then, when Yuu sees her son Kouji's big dick, she plans to seduce him with the T-front panties she bought a long time ago to excite her husband. Kouji can't resist Yuu's extreme and erotic appearance and sexual techniques, and he continues to eat her deliciously until his sexual desire is exhausted.