It was a sunny day as the birds chirping and the cool breeze. We see a park with children running around using different types of quirks but there is one who is not and this is Ace Hijiri who was just diagnosed as quirkless and the word spread quickly as none of the other children want to play with him. He was always blamed for things he didn't do and when he try's to defend himself he he gets in more trouble. He starts training to get into a hero school so he can become a hero. He would run laps around the park and punch and kick a tree to strengthen them. He would also do push-ups and chin-ups with weights on. His only friends are Mina Ashido and Ejiro Kirishima while at school growing up. While he was training he met the pro heroine Mirko who offered to train him which he agreed. He learned how to use the eight gates and got a support gear for combat. He trained using his staff and capture gear. Now we see him going for his final year in middle school 10 months before the entrance exam.