Aesthetica of a Rogue Hero

For thirty years, thousands have journeyed to distant worlds. Those who return retain the powers they wielded there. Akatsuki Ousawa returns from the realm of Alayzard with the defeated Demon King's daughter, Miu. To conceal her true identity, Miu poses as Akatsuki's sister. They enroll at Babel, a school for inter-dimensional travelers, and they contend with the student council while uncovering the truth behind the school.