Iori, a married woman who is having an affair once a month with a young man named Yuzuru whom she met at her part-time job, has arranged to meet him at her house after her husband goes to work. At the appointed time, Yuzuru comes to her house, they look at each other, embrace each other, and kiss passionately at the front door. At the same time, a gorilla escapes from a nearby zoo. An evacuation order is issued to all nearby residents, but no one can hear the two of them as they make love more passionately than usual and repeatedly cum inside each other...