He used to be a Hero of the Gacha Arena until his lust for victory crossed the line. Leion Tigerhart, a man who loved a fair and square fight, was the most admired man in the arena, until one day he began to start making his opponents suffer, even killing some. Leion was imprisoned until a shady looking man who appeared from nowhere gave him a mask that granted him powers of corruption, allowing him to escape from prison. He might have escaped prison, but he hasn't escaped from the Guardian.