Yes, I can recommend "The Four Princesses of the Cold-Blooded Killer" to you, a romantic youth-youth school novel. The four female leads all have the identity of cold-blooded killers. They have different personalities, but they are life-and-death friends. She was mysterious and cold-blooded, charming and bloodthirsty, lively and bloodthirsty, cute and cold. They had once vowed to make those who had hurt them suffer so much that they wished they were dead! I hope you like my recommendation. Muah ~