The story follows an international training organization named Babel which protects the young people returning from another world. A wayward hero named Akatsuki has come back to the real world from a world of sword and magic called Alleyzard, along with beautiful girl, Miu, who is a demon king's daughter. In the academy of Babel, Akatsuki confronts other "returners", who have psychic powers.

Hero defeats bad guy. Good triumphs over evil. The end. Or, at least that's how it usually goes. But what happens after the hero goes home? Our hero, Akatsuki Ousawa, is about to find out that sometimes the greatest adventure starts once happily ever after ends.<br><br>
(Source: FUNimation)

Summoned into an alternate world of Alayzard, Ousawa Akatsuki helps defeat the demon lord, brings harmony back into the world and, under the demon lord&rsquo;s last request, takes the demon&rsquo;s only daughter back into Akatsuki&rsquo;s own world. It turns out that being teleported into a different world is somewhat of a common occurrence. Those who find themselves back home often come back with the power to use magic and the world organization fearing people like Akatsuki created Babel, a school to teach and keep tabs on the magic users. Akatsuki is able to pull the demon lord&rsquo;s only daughter into Babel as his sister, Ousawa Miu. A new chapter for Akatsuki is about to begin in his own universe.<br><br>
(Source: MangaHelpers)

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