Yuna has been married for 10 years to her husband who works at the same company. Her husband has been having an affair with a subordinate at work, and their relationship has become cold. One day, Yuna, who is in the prime of her life and can only comfort her body by herself, is visited by her former colleague, Oshima. The two, who had a relationship like friends, reminisce about old times, sympathize with each other's situations, and press their lips and skin together to fill each other's loneliness. In a room with a broken air conditioner, the only sounds echoing are the sounds of their sweat and juices being sucked, as they indulge in an obscene 69-style sex session...