In a shared hallway of an apartment complex, a couple is in the middle of moving, surrounded by stacked cardboard boxes. Next door, the Morikawa couple has just moved in. Mrs. Morikawa exchanges greetings with Ayaka Fujikita, their new neighbor. Unbeknownst to her, Ayaka is a lesbian who begins secretly watching Mrs. Morikawa. As the recently moved-in Morikawas settle in, Ayaka finds herself increasingly drawn to them. Her feelings for the couple grow harder to conceal as her relationship with them deepens. The quiet tension of neighborly interactions begins to twist into something more intimate, leading to unexpected developments in their daily lives.