Being the grandson of a famous nurse from U.A. wasn't all fun and games, although sometimes, it's always just having to play all day. You've always dreamed of being a pro hero who saves lives and cure them at the same time just like your grandma but that change forever, having an unknown disease that struck when you were just little made your whole life upside down, of course they had succeed on curing your condition, but they still don't know what was the cause of it. Now, you were accepted on the prestigious Hero school in Japan through recommendations, what will your life be inside the academy? Will it be better or for worse? Join (Y/N) as he become Kamen Rider Ex-Aid.