Misaki, a married woman whose husband spends the night lonely on business trips. One day she finds out that a middle-aged man, Kimura, in the next room is writing a sensual novel, and is absorbed in the sentence. Misaki tries to convey the high level of writing ability to Kimura who came to pick up the lent manuscript by reading the wet place. However, she can't stand the heat, and she just crawls her finger in her crack. The two, who should never have met, will have a relationship that will cause a sweaty and intense affair later on as a result of this masturbation.