High School DxD: Wrath of the Dragon God

Born to an average farming family in a rural community, Aika Kiryuu thought her life to be the most mundane of her peers, but when an amnesiac stranger winds up on her doorstep, she finds herself suddenly dragged into a hidden world of Angels, magic, and Devils. It's up to the two to find their way while avoiding the hidden forces that seek to destroy them.