The novel is about a girl named Airi Yumiya who traveled to the world of Beyblade due to an accident, and replaced a girl with the same appearance, personality, and name, who is Kenta's sister. She hopes to use her knowledge of the development of the plot to save everyone and change the plot, but she realizes that it does not work. Some things happened. She met a girl who also traveled through time. Airi ended up with three male characters, but in the end will she travel back to the original world or stay here?