At the Beginning, She Tore up the Family Tree with Her Hands, and She Rose to the Top by Catching Monsters.

[Crazy batch of escaped female gangsters x sinister and tsundere black lotus] [suspense + reasoning + investigation] In the second year of Jianyan, in the Yan Dynasty, evil spirits were everywhere, and a profession came into being called the demon catcher, or the demon killer. However, due to an accident, Luo Wantang, the first genius of the Luo family, lost all his spiritual power and became a useless person. The strongman who once almost suppressed an era seemed to be no different from a mortal after losing her proud spiritual power. She thought she would spend the rest of her life in a mediocre way, until one day, the Demon King, whom she once regarded as her old enemy, appeared in front of her. "Hey, little monster hunter, how about I negotiate a deal with you? After it's done, you can take my life." … From then on, the two began to explore the case together, but many years later, when the last heart returned to the demon king's body, he began to regret it. "Hey, that little monster hunter, can you go back on what I told you before?"