Tatsuya and Kaori Iwase are happily spending the day in their apartment when a new married couple moves into the apartment next door. The Kayabes seem like nice people, which puts the Iwases at ease.

However, they soon come to realize just how thin their apartment walls are when they are subjected to noises coming from the Kayabes’ apartment.

Will the Iwases confront their neighbors and will the nightly disturbances cease?