The neighboring couple always flirt in the hallway of the apartment building without caring about the people watching. The single man feels mocked by the couple as they behave arrogantly, as if they are ignoring his existence, and decides to relieve his frustration with a hypnotizing device he found online. "You will gradually become sleepy... 3... 2... 1..." The hypnotizing effect is greater than he expected, and he comes up with the idea of turning the married woman into his sex slave. His desire escalates even further, and he begins to brainwash and control both the husband and wife...