Dragon Nest: Shungeki no Sedo

Sedo is a young swordsman traveling in hopes of becoming a great hero. When the girl Roze is abducted by monsters, he sets out to rescue her with the archer Okiron and the sorceress Yuri. Their journey reveals the shadow of Belskard, a mysterious man in black, and ultimately draws them into a conflict tied to the Black Dragon and the history of war between dragons and humans.