Ousawa Akatsuki was summoned to an alternate world called Alayzard where he assisted in defeating the demon lord and restoring harmony. As the demon lord's dying request, Akatsuki brought the demon's sole offspring back to his own world. To his surprise, many individuals experience teleportation to alternate realms, often returning with magical abilities. Fearful of these individuals, a world organization established Babel, a school to monitor and educate magic users. Akatsuki managed to enroll his new companion, the demon lord's daughter, into Babel as his sister, Ousawa Miu. Now, a fresh chapter awaits Akatsuki in his home universe.
