Legend: the Dark Knight

The story of a summoned hero who becomes a dark knight and protects the Demon King from the hero. Long Yan was suddenly summoned to a different world. The one who summoned the dragon flames was the Demon Lord Mordus. And now, the country controlled by the devil is about to be destroyed by a brave man. The ferocious-looking Demon King Mordus bowed to Dragon Flame. "Please help me! Savior!" Dragon Flame eventually became the Dark Knight and helped the Demon King. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.