Kasumi, a fifty-year-old mother who exudes an elegant atmosphere, is surprisingly perverted beneath her appearance. She repeatedly engages in lewd acts with her only son, Koji, at night and can't wait for him to return before indulging in intense self-pleasure. Just then, Koji brings home his drunk friend Takashi. The mother, after putting the friend to bed, engages in acts with her son. Takashi, witnessing this lewd scene, becomes aroused and visits again to confess his feelings. The fifty-year-old mother, driven by lust, boldly spreads her mature pussy to tempt Takashi.
