The Summer of Revenge Girls

They wanted to avenge their mother. After three years, they were transformed and became the world's number one mysterious business owner and the world's number one killer. They are graceful princes, the young masters of the second-ranked family in the world, and the second-ranked killers in the world. What should they do in the face of revenge and love? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.