If it doesn't meet the requirements, I won't recommend a novel that's NPC. According to your needs, I recommend the book,"The World: The Secret Service Miss Is Too Enchanting." The female protagonist of the book was the most outstanding cold-blooded agent in the organization. After transmigrating and becoming the forgotten Third Miss of the Prime Minister's residence, she experienced a near-death experience and her strength soared. She countered every move she made, killing one when one came, and killing two when two came. She was very powerful. The male protagonist was the most outstanding noble prince in the Imperial Kingdom, the perfect blood heir. He was cold, evil, dangerous, mysterious, arrogant, and domineering. Their story was full of suspense and excitement, and there were also many elements of love. I hope you like this fairy's recommendation. Muah ~π