The Demon Prodigy, Osmau Dazai, and former Sheep King, Chuuya Nakahara, who are both known as Soukoku, which translates into Double Black, have been sent into an unexpected mission. I mean, c'mon, who was expecting two people who come from the Port Mafia to go into a hero school? Not to mention, the most famous and well known hero school, UA. What's going to happen on this mission? Will they complete it? Will they run into trouble? Read to find out...