It tells the story of a young man who strives to become number one on the Yunyan Ranking in order for humans and monsters to live in peace, changing the rule in the world of immortality that monsters will be killed if they encounter them. There were constant ups and downs along the way, but with the support and companionship of my lover, relatives and friends, my wish finally came true. The so-called slaying of demons does not mean to kill them all, but to give them a chance to be a new person.