Step into the sensual world of Narita Kanako as a devoted mother faces the bittersweet moment her son leaves home. Torn between love and desire, she invites him on a secretive onsen journey where forbidden passions ignite under warm steamy waters. Witness their intimate connection deepen amidst the serene Minamiaizu Oyu Onsen landscape, in this evocative, mature tale of longing and seduction.