The story is set in the distant mountain village of Okukozome-chou. Haruka Kazugano and his twin sister Sora have fond childhood memories of going to the village to visit their grandfather during their summer vacations. However, after losing their parents in an accident, the two must move in with their grandfather.

The twins get reacquainted with their old childhood friend Nao Yorihime, their new classmate Ryouhei Nakazato, the miko (shrine maiden) Akira Amatsume, and Akira’s friend Kazuha Migiwa. All seems peaceful and familiar. However, beneath the surface is a secret promise that the twins made with each other long ago, the whereabouts of an important lost item, and the real reason they chose to come back here.

The protagonist, Houkou Hayao decides to take a job interview at a family restaurant, "Berry's," in order to find out what to do when he graduates.

On the same day as the interview, he bumps into a certain girl who just got out from the interview room in a bad mood, and binge eats at Berry's. He later ended up hanging around with her. When he gets home, he finds out that Yuuka, his sister, has found out that he got a job without her permission.

Later, he learns that the binge-eating girl which introduces herself as Morikubo Yuna he met is actually a new employee like him.

(Source: MU)