The Heroic Beast

In a world where females are more dominant than males, there was a girl named Izumi Midoriya, a girl that was the 9th User of One For All going to St. Freya...where the school has two areas, the female and the male side...men were known to be weaker than women, except for one...which so happened to be the brother of Izumi who had given up on being a hero a long time ago...but what would happen when he would have to reveal himself to the world?