After committing a crime, three friends—Kohé, Atsuya, and Shōta—hide in an abandoned, unremarkable little shop. Waiting for morning, the young criminals notice that people keep coming to this place that’s been forgotten by the world. In a mysterious way, they leave letters through a mail slot in the door. And each one is either a request for advice on the painful question tormenting the writer—or a heartfelt confession. As the heroes read stories of strangers sending messages through time and space, they begin their own investigation of this magical shop. They don’t even know that, wanting only to wait out the storm, they’ll suddenly find themselves in the epicenter of a tornado of unimaginable wonders.