Anzu Hoshi and Kirigo, a playful couple, are happily living together. One scorching summer day—rumored to be the hottest in Tokyo—their air conditioner suddenly breaks down. They try to cope with fans and handheld fans, but the unbearable heat gradually blurs their senses. With no choice but to wait for the repairman, Kirigo finds himself overwhelmed with uncontrollable desire as he watches the sweat-soaked Anzu.