Y/N and her twin were born with a dangerous secret tied to the mysterious Tsugai known as Left and Right. Since childhood, strange creatures have followed your family, and hidden organizations have searched for the power sleeping inside both of you. After an attack destroys your home, you escape into the world of My Hero Academia and enroll at U.A. High School under a false identity. While heroes believe your abilities are just another quirk, the truth is far darker. Left and Right remain constantly at your side, protecting you with terrifying loyalty while hidden enemies close in. As villains, heroes, and Tsugai users begin to collide, you must decide whether your power will save people—or destroy everything around you.