Sui Tsukinoe lives a quiet life running a cafe with her fiancé, but when she's invited to a class reunion, she's reunited with her ex-boyfriend—the man who once owned her as his sex slave and called himself her master. Though he's now married and she thought their relationship was over, her body still remembers his intense stimulation. In front of her classmates, he suddenly reconditions her with brutal deep throat. Lying about a second gathering, he drags her to a hotel, flips their power dynamic, and dominates her with hard slaps and spanking. He mercilessly creampie-fucks her, spewing cum as he degrades her. The memories of being a cumdump fully awaken—she can no longer be satisfied by gentle sex. She's no longer a wife or a woman; she's just a bitch in heat.