Misaki wants to escape her everyday life and set out on a journey somewhere. And while she doesn’t yet know what she will be in the future, Misaki knows for certain that she wants to find something she is passionate about. Soon after arriving on campus to start her college life, she meets the members of the Railway Travel Club. Misaki’s heart now beats with excitement for the new world that lies ahead on the railway.

Sisters Fuu and Rui used to be close, but have been a bit distant from each other recently. One day, Fuu encounters a mysterious spaceship and gains magical powers. At that same time, Rui also gains magical powers, and both transform into the adults they dream to be. The sisters' powers come with two conditions: their magic powers can only be used in one year, and no one must know about it. Unaware of each other's secrets, Fuu and Rui become active as idols.