On the day a married woman agrees to sex for extra money, she unexpectedly meets a troublesome, self-centered male masochist. Though surprised by his unreasonable requests, she decides to fulfill his desires. She treats the man's face like a chair, sitting on it while setting various conditions for the encounter. She demands phrases like "You can lick it, Kobuhei-kun," asks him to take photos of her face, and wants him to feed her tea mouth-to-mouth. Possessing both sadistic charm and a nurturing nature, she teases him during sex—saying things like "Your nipple is so hard"—prodding his frustration while still tending to her own pleasure. Meanwhile, the man remains selfish, constantly imposing his own conditions. The dynamic between them builds intense anticipation as their sexual encounter unfolds.