Eongmanmurim

66 million years ago, a martial arts world where dinosaurs wield martial arts. Amidst the chaos following the Heavenly Demon's Rebellion, the young Triceratops boy Byeokroea, having lost his master, embarks on an adventure to uncover hidden martial arts and the truth about the Heavenly Demon. Facing a colossal conspiracy and the secret of a great catastrophe, he becomes the last hope of the dinosaur martial arts world.

(Source: Naver, translated)