I am a lonely soul with an unknown name, unknown age, and unknown cause of death, which means I am a wandering soul with no memory. I want to find my body, and I want to know the cause of my death. Being helpless, doing nothing, and aimless are synonymous with me now. Until I met the soul-drawing messenger, I thought I saw hope, but he told me that the underworld refused to accept it... Kao! What kind of world is this!