A young man who is being corrupted by the "Curse Emblem", and as compensation for the power he received, he is slowly transforming into a Demon due to the cursed emblem. Desiring a power to protect those he loved in the past, when he emerged from those crises with the power of the emblem he obtained, he realized he would turn into a demon that would harm everything around him, and as a result he threw everything away and joined the "Dark Irregulars". He cannot stop the corruption of the emblem, and tends to quicken its gradual takeover of his body. When all of his "human" will is consumed by the darkness, the lawless realm of monsters and demon will welcome a new friend and comrade in the truest sense of the term.