Rumors spread that the company's sales department is a gathering place for big tits enthusiasts, and among them, Misuzu, a seemingly plain employee, secretly possesses G-cup breasts. Her coworkers, noticing her voluptuous figure, begin developing romantic fantasies about her one after another. One day she's restrained and forced into titty fuck, another day dominated and pressured by a sadistic handsome colleague—her body gradually defiled throughout her daily work routine. Unbeknownst to her, Misuzu slowly becomes aware that her own breasts are being exploited.