The year is 2087 when a dimensional rift appeared above the Pacific Ocean located a little near Japan. This dimensional rift is connected to a world called [Atlas]. After a year, the representatives of Earth(Japan) had a talk with the representatives of Atlas, regarding exchanging students of the two worlds. This is the story of Asakawa Seiji, a student who applied to be an exchange student for the reason of getting a stable job in the future, after he joined the mystery club.