You're a half human,half demon child. And you are Rin and Yukio Okumura's little siblings named (Choose your own name) Okumura. You have powers like Rin,but you can't control them, so when your adoptive father, Shiro Fujimoto, died, you want to True Cross Academy with Rin and Yukio because someone needed to watch you. You also go to cram school with Rin, and sometimes Rin teaches you how to control your powers.