For Rinko, a 24-year-old office worker who lives alone and keeps her otaku side hidden from everyone around her, Tadaima, Ojamasaremasu! turns a quiet private routine into something far more unsettling. Her carefully controlled apartment life falls apart when a hole in the wall connects her home to the two neighboring rooms, transforming the place that was supposed to be safe into the center of awkward and disturbing encounters.
To one side is a fresh-faced but mysterious man who is unexpectedly kind toward Rinko. To the other is another enigmatic neighbor with violent tendencies, whose presence feels disturbingly familiar from the moment he appears. As the strange arrangement forces Rinko into closer contact with both men, confusion and tension quickly give way to moments of unexpected closeness. She cannot shake the thought, "I... I think I know him!" and that feeling only deepens the unease inside her apartment.
What was once her only refuge from the outside world becomes a space where privacy disappears and every day brings another heart-pounding surprise. With her solitude shattered, Rinko must endure a situation that grows far more complicated than simple room sharing, even as her life becomes tied to the mystery of the two neighbors next door.