Hajimari no Boukensha-tachi: Legend of Crystania

はじまりの冒険者たち レジェンド・オブ・クリスタニア

Ashram, desperate to find a home for his people, is tricked into selling his soul. 300 years later, Pirotesse's devotion to her king remains unshaken. In the sacred world of Crystania, amidst a civil war waged by shape-changing warriors, she searches for her beloved Ashram. She meets Redon, a young prince obsessed with avenging his murdered parents. Together, they confront Ashram's captor -- the bloodthirsty Barbas, who aspires to rule Crystania as "The God's King".

(Source: Anime News Network)