The promise (A Boku No Hero fanfic/Izuku Midorya x OC)

Book 1 80% of the population poses a power, different from person on person. Those "powers" are called quirk. A teenage girl named Tsuki Kazuko dreams of being a hero and saving the world of all evil. On the age of 15, she decide to go to the best hero school of the world, U.A. high. All the characters (except my own...