Hanging Garden School - Babylon, the world's first academy full of mystery and glory. The school is responsible for training the most powerful students in the world - the Paladins. In this academy city where the ratio of men to women is only 1:10, what will happen to the protagonist? ! The combination of machine combat and magic, who will duel with whom? Who meets whom? What will happen if humans, elves, orcs, angels, demons, vampires... Coexist in Babylon? What kind of overt and covert struggles are there between the three student unions in one school? What kind of experience will the protagonist have? We'll wait and see~