Izuku Midoryia, and Bakugo Katsuki were both caught in an explosion, that took them to another world. A world that no one wants to be in, a one where humans hide inside of walls. To protect themselves from the titans. But, they also notice that they aren't the same age they were before the explosion. They are 10 once again. They still have the same looks, but just their 10 year old self. They also have their quirks. Not updated too much- sorry bout that.