An adult college student lives a dreary life in a shabby apartment, trapped between blaring alarms, unwanted work shifts, and a future with no hope. Then the beautiful and mysterious Aoi moves in next door and repeatedly invites him over. Unable to resist her sweet whispers, he shuts himself away with the married woman and becomes addicted to decadent, intensely intimate sex—until he falls so far behind that he has to repeat a year at university.