The location of the story is one month before the comet that returns once every millennium visited, Komachi Itomoricho, a rural village in Hida City, Japan. Here, the female high school student Mitsuba leads a melancholy life every day, and she is troubled not only by the election campaign held by her father, who is the mayor, but also by the ancient customs of family passing down the shrine. In this small town, there are just some old people who care about it. For this reason, Sanye is full of longing for the metropolis.
However, one day, I had a dream of becoming a boy. There are strange rooms and strange friends here. And what appeared before me was the streets of Tokyo. Although Sanye was perplexed, she felt refreshed to be able to live in the city of dreams and thoughts. On the other hand, Tachibana Taki, a male high school student living in Tokyo, also had a strange dream. He became a female high school student in a small mountain town that he had never been to before. The two met each other in a dream like this.
