Ao no Exorcist: Yuki no Hate-hen

Two brothers Rin and Yukio Set out on their journey to become Exorcists and discover their origin. Rin has come to know that he is the son of the demon and the new Shaitan. Now they have to face a Demon who wants to bring endless winters into the world. Yukio came to know about the hidden power and his past. Youki then gets lost in finding the truth while Rin is alone to fight against the Demons. He wanted to save his brother and their blood bond. In the final, Yokio gets over its powers and now they have to face the snow arc.