The Titan Hero

After Izuku Midoriya a.k.a Deku receives his quirk from the number one hero All Might, he begins his hero academia. But even despite her joy for her son finally having a quirk and being able to work towards his dream to become a hero, she is also scared that he is in over his head and needs someone to watch over him, so she calls the one person she knows can protect Deku. Y/n Midoriya, Deku's older brother has been training to become a hero in Germany but when his mom calls him and hears that his brother finally has a quirk, he rushes home to Japan and joins his little brother at U.A. Y/n has a very unique quirk that has many people's interest, especially the interest of a mysterious villain who knows a secret about Y/n's quirk that he doesn't even know himself, a secret that could make his quirk the most powerful in the world.