In the far future, the human race advanced to space, and prospered. However, Jikushin which occurred suddenly intercepted all networks, and all the civilizations were reset. However, the human race begins to revive, and enters the prosperity age of The Second by the Transvaal imperial country which rises at the center of the galactic system. The science and technology before the civilization was reset, that is, "Lost Technology" was considered to be god`s task. (myanimelist.net)