Katsuki's Younger Sister(Discontinued)

Katsuki is known for his powerful quirk, his good looks(?), And also from being a bully in school. What if I told you the famous Katsuki has a little sister. Will he soften up around her. Or will he be the same to her as he is to everyone else. Find out in the book! WARNING: This includes cussing because Katsuki exist...