Misaki, a married woman whose husband is constantly away on business, spends her nights alone. One day, she finds out that Kimura, a middle-aged man in the room next door, is writing erotic novels, and becomes obsessed with the writing. When Kimura comes to retrieve the manuscript she lent him, Misaki reads out the sex scene, trying to impress him with his writing skills. However, unable to contain her heat, she ends up running her fingers along her slit. The two, who were never meant to meet, end up in a passionate affair, with the two of them drenched in sweat, starting with this masturbation session...