Shen Gu Zhu, one of the Thirteen Protectors of Yanan, is a delinquent boy with a feminine appearance, a fiery temper, and absolutely no luck with women. He's also the owner of a poorly run bodyguard company, and has set a new record for protagonists dumped fifty times right from the start, surpassing that red-haired delinquent.
One day, he was captured by the evil organization Red Oath Court and forcibly transformed into a wildcat-type Blood Spirit Monster. After breaking free of their brainwashing, he resolved to become a Blood Spirit Hunter and stop them from spreading a forbidden curse across the globe to control the world. He swore to fight the Red Oath Court, the organization that had transformed him, to the bitter end.