Character information/ backstory

This group of friends is not your ordinairy friend group, Ayanokoji (Koji) 16 , is a mysterious guy he transfered to the best school in Japan on recomendation. the school is abandoned on an island. this school isn't just any ordinairy school. people with unatural ability get accepted. but these people are called "Abnormals" a long long time ago Abnormals had a war against humanity. ad they are hunted down by "Hunters" there are currently 4 known hunters their names aren't confirmered but this friend group notices something isn't right on this island.