Fearing layoffs, office worker Jun is deceived by her coworkers and subjected to deep throat training, awakening her masochistic, perverted desires. Lacking confidence in her work and harboring daily frustrations, she instinctively swallows her colleagues' penises deep into her throat, gasping and grimacing in apparent distress, yet chasing pleasure. Her mouth is no longer just an organ—it transforms into a tool designed solely to satisfy others' sexual needs. "Please... my mouth-pussy... won't you use it as a tool to relieve your sexual desires?" With these words, her new craving emerges—and so does everyone's growing obsession with her.