You and Izuku are twins. However after you two were born you mom, Ink, and father, Hizashi got divorced. Izuku stayed with Inko while you went Hizashi overseas. You didn’t keep contact either as it was difficult to communicate from all the way in America to Japan. Until highschool when you get into UA on recommendation and so you went back to Japan alone because your dad Hizashi stayed in America for his work.

Come the first day of school at UA you walk into the class you were assigned, 1-A, and to your surprise you see Izuku there in the same class as you.