A married woman's heart and body are stirred by the waves of a hot spring, embarking on a journey of new emotions. As her relationship with her husband grows cold and love fades, she chooses infidelity. Longing to experience the intense pleasure her friend described—one so powerful it causes fainting—she pleads with the man to make her feel it. In the midst of passionate sex, she reaches her first ever climax, awakening her sexual desires. The next morning, she eagerly submits to the man again, actively grinding her hips, fueling a burning new lust within her.