MHA sister

Eri has gone missing. Not just your usual run-of-the-mill missing but the "completely-gone-from-any-radar" missing. Aizawa is worried out of his mind and so are the students of 1A. Even after days of searching and turning every stone there are no clues on her whereabouts. The whole class is getting desperate. And then Denki has a very dangerous idea. He suggests asking you for help. His older sibling. What the class doesn't know is that you're a notorious villain. But to help your little brother you'd even help heroes.