After 15 years of marriage, all passion between Yuka and her husband is gone, and he only uses her roughly for release. While spending her days trying to satisfy her lonely body herself, she unexpectedly reunites with Ozawa, a former coworker. Sharing the pain in their lives, they seek comfort in each other and greedily devour one another. In a room with a broken air conditioner, they sink into filthy 69 sex as only the sounds of slurping sweat and juices fill the sweltering air.