After mistakes at work and a breakup leave Shinji desperate, he impulsively heads to a hot-spring inn instead of work. There he meets married Nami, and the two connect so quickly that they soon retreat to a room together. As they reveal their emotional wounds, their bodies come together and they surrender to the thrill of infidelity. Forgetting everyday life, Nami loses herself in fleeting pleasure with a stranger as they sweat and devour each other amid the steam...