After Assassinating the Prince, I Became the Queen.

My name is Ling Shuang, I am a killer, and I am in a panic now. The mission target, His Royal Highness, seems to have fallen in love with me. His younger brother, the third prince, is also very interesting to me. My boss, the imperial concubine, wants to kill me. And in the sound of my piano, there is a secret that can overthrow the dynasty. Now the prince is listening to me playing the piano, his eyes are getting deeper and deeper... Should I kill him first or run away first? [Cold-blooded Female Killer × Dark Prince] P. S. The protagonist's name in the introduction was written randomly when opening the book, please ignore it~ ----- She is the sharpest sword in Nanzhao, Ling Shuang, the successor of Jueyin Sect. One string kills, ten steps kill. He was ordered to enter the palace with only one goal: to assassinate the prince of Shuo Kingdom, Shen Tingyun. He is the coldest shield of Shuo Kingdom, the iron-blooded prince Shen Tingyun. See through it at a glance and take care of it step by step. Knowing that she is an assassin, he still wants to keep her by his side to see how she struggles and how she is tempted. She thought this was a life-and-death battle. But he said: "You have been mine since you carried me out of the dense forest of Nanzhao." When she put down the piano blade, he handed over the Phoenix Seal. "I don't care about your past, but I will take care of your future." —— "I can't play the piano, I can only kill people with the piano." "Then kill me and use you for the rest of your life."