Izuku Mizu, Steven's Older Brother.

( U.A. is a university A.U. )

When Izuku Yagi was 4 years old, he was diagnosed as Quirkless and after he was, his parents, the Pro Heroes, All Might and Green Tempest, began neglecting him and his twin sister and his now former childhood friends began bullying him and beating him up everyday, sometimes even almost half to death. And finally, on the night before his 16th birthday, Izuku reaches his breaking point after finding out that All Might and Green Tempest were his neglectful parents and decides to run away. After Izuku does, the truth about what he'd had to go through all these years is revealed on the night of his and his twin sister, Izumi's birthday, however, it was already too late as Izuku had already sneaked his way on a plane to America.

After sneaking his way onto a plane to the US, Izuku eventually finds his way to a small beach town ironically named Beach City. Here, along with awakening multiple different Quirks, Izuku also meets a half-human, half-alien boy named Steven Universe along with his alien gem family called The Crystal Gems. Izuku decides to stay here in Beach City and as times goes on, Izuku becomes Steven's older brother figure, gets his own hero license through alternative methods, saves up enough money to open up his very own cafe, goes on adventures with Steven and The Crystal Gems, even saves The Earth and goes to space a couple of times, and he also meets a beautiful gem woman named Lapis Lazuli as well, who Izuku develops feelings for.