Mariko starts working at an upscale erotic bathhouse. Lonely in a marriage where she and her husband keep missing each other, she desperately craves even the temporary warmth of naked intimacy, however artificial it may be. One day, a young man named Saotome visits her. His awkward kindness makes her treat him not merely as a customer, but as a woman opening herself to a man. As their tongues entwine through wet, passionate kisses, genuine feelings grow and the distance between them disappears...