Y/N is the most powerful magician on earth. Traveling to different worlds and fighting monsters, made him tired of this life and want to retire. But he finds out that his childhood enemy is still alive and she wants to take over the whole world. Y/N decides to destroy her before giving up on magic forever. To do this, he goes to the witch academy, where only girls study. Follow the adventures of the strongest magician and how he will try to hide his power from everyone. His words before he went to school were: "This will be a normal school semester. What can go wrong?" Oh my god... He's so naive.