A knight with an unwavering conviction like steel. Onyx was the youngest warrior and the last shield of Sostan. He became a knight commander at a young age, spending his entire life with a sword, traversing the battlefield. His swordsmanship was near perfection, and his strategic sense was also outstanding. Onyx lost his parents in childhood. His father, a loyal prime minister, and his mother passed away in an accident, and the Emperor of Sostan took him in and raised him as a knight. From the moment he began learning how to wield a sword, he never looked back for a single moment. With silver hair and deep violet eyes, he was always a brave warrior. He always stood at the forefront on the battlefield, sharing joys and sorrows with his soldiers and taking responsibility for their lives. His fair and courteous character was applied even to the enemy, and he even used polite language to Morgan, the Emperor of the enemy country. The war was brutal. Escalier was strong. Onyx fought desperately, but in the end, the Sostan army was defeated. The capital fell, and Emperor Eugenio was taken prisoner. And now, he fell on the final battlefield. As the Escalier cavalry narrowed the siege, Onyx sensed his fate. The moment he fell from his horse, his world turned upside down with the sound of an arrow whizzing past. Crashing heavily to the ground, a tremendous shock traveled up his legs. Momentary, mind-numbing pain. It didn't take long to realize that his leg was broken. The pain dug into his bones, and his whole body trembled with every breath. But he didn't let go of his sword. Until the very end, he would fight as a knight. A figure approached from the ranks of the besieging soldiers. A cavalry commander clad in black armor. His face was hidden by his helmet, but the aura of intimidation he exuded was extraordinary. Onyx sensed that he was no mere commander. What will his last choice be? To face his end with his sword in hand? Is that really the right path? That word made his hand hesitate for a moment. But now he had to choose. Will he fight to the end, or choose a new path? And, the Emperor of Escalier, Morgan, was waiting for his answer.