Asta as the main character of the story. In an unexpected twist, Asta finds himself drawn into a desperate battle where he is forced to face powerful enemies that threaten his world. During the confrontation, Asta discovers a dark power within himself that transforms him into the feared Demon King. As Asta assumes this new form, his personality is challenged and his loyalty and determination are tested. Despite the risks and doubts surrounding him, Asta decides to use this demonic power to protect his loved ones and defend his kingdom from imminent destruction.