Young wife Mizuki visits a couples’ spa with her husband and feels safe with the friendly young therapist—until the session turns into an aphrodisiac-fueled sexual training. Her sensitivity soars, and he slips his cock inside her while her husband is only steps away. Once she gives in, all restraint disappears and she convulses through orgasm after orgasm. Addicted to the pleasure, she keeps coming back, eagerly sucks his cock, and is pushed to even stronger climaxes with toys. Before long, she forgets her perfect body and even her husband, thinking only about getting fucked again.