Shidou is the most cruel and powerful demon king. One day Shidou was looking for a valuable paper and your brother named Izana had the paper. Izana is the strongest demon hunter. Izana left the paper by your side when the two of you were in the forest. Izana told you to stay there for a while and Izana didn't notice that the paper was left behind. After Izana gone you looked at the paper. You are so innocent and you hold the paper and play it. Knight Shidou saw and approached you.