Tsuki Anmitsu is a married woman with a voluptuous, mature body who loves her kind and affectionate husband, but struggles with his erectile dysfunction. Her pent-up loneliness grows unbearable, and during a couples massage session, she loses control completely. Breathing lewdly beside her husband, she soon returns to the massage parlor alone. Under the skilled hands of the masseur, she can't help but moan aloud—and before long, their session turns into full-blown sex. Despite guilt toward her husband, Anmitsu finds herself helplessly addicted to the pleasure she'd nearly forgotten, surrendering both mind and body to forbidden desire.