BABEL is an international educational institution that protects young people who have returned from another world. Akizuki Hoze, who returned to the real world from the world of swords and magic, Alessand, is the first true hero to defeat the Demon King since the founding of BABEL. In addition, he is accompanied by the Demon King's daughter Myuu, who is entrusted by the Demon King and is as free and unrestrained as a man. The feminist heroine Akizuki, who loves women, lives a slightly H school life with the heroine brought back from another world and the beautiful girls in the real world. On the other hand, they are slowly involved in the power struggle in the school and the war with the student council members.