You're a 10 years old person taking a walk on a moutain in the morning until you see Muichiro, he was walking to his house, his body filled with injuries there and there, half-dead and you were scared, you then see a demon stabbing in all parts of his body, burning under the light of the sun and screaming in pain. The boy he desperately try to reach his home in where was his older twin brother with a ripped off arm and half-died too Muichiro :"Nii-San..." (He falls)