Aesthetica of a Rogue Hero - S01

Thirty years after Samon Syndrome was first discovered, thousands of young people have crossed over into fantasy worlds, and the few who make it back manage to keep the special abilities they picked up in those parallel universes. Akatsuki Ousawa, known as the "Rogue Hero," gives up his quiet life in the fantasy world Alayzard to take on new challenges after returning to Earth. He brings back Miu, the daughter of the Demon King he defeated, and now has to hide her real identity by passing her off as his little sister. The two soon enroll at Babel, a special school built for people who gained special abilities and magical powers from traveling to a fantasy world. Babel claims it was founded to train young interdimensional travelers and "guide them to the right path for the sake of humanity and themselves," but the pseudo-siblings still do not know what the school is really after. Can Akatsuki and Miu get past the hostile, powerful student council and find out who is pulling the strings from behind the scenes?