In a world where strength determines one's destiny, Katakyu was born without an aura that gave him the ability to defend himself, being seen as weak and without a future. However, he did not lose hope. Despite his lack of strength, Katakyu dedicated his life to working hard with his parents in agriculture, and spent his free time training in secret away from his village, trying to develop his skills. But one day, when he was late for his training and returned at night, everything changed. As he approached his village, he saw the flames mercilessly devouring it. When he rushed home, he found that it was too late; his village had been completely burned, and no one, including his family, had survived. Under the weight of grief and anger, Katakyu made a fateful decision: to become strong at all costs, and to take revenge on the person who ruined his life. But the path is not easy; the world is full of hardships, enemies, and challenges that require more than just physical strength. Will Katakyu be able to overcome his weakness, and overcome all obstacles to achieve his revenge? Or will the odds overcome him and he lose the battle? Katakyu's journey is an epic story of determination, pain, and the search for justice in an unforgiving world.