Spiritual Realm a Thousand Years War

He unexpectedly came to this continent where spiritual power is respected. With his cowardly personality, he would not have survived, but... He met the black cat... This old cat has been teaching him how to survive, and what is its true purpose... "Young man, do you want to gain power? Come and gamble with me. If you win, I will give you power. If you lose... You will become my food!"