Frost Blade Enters the Rich Family: the Fake Daughter Is Actually a Top Killer

I, codenamed Thirteen, am the sharpest knife in the shadow organization. In order to survive, I took the place of the real daughter of the General's Mansion, and my mission was to destroy this family with my own hands! I thought this was just a cold disguise, but I never thought that what was waiting for me was a group of "crazy people"! I was filled with murderous intent, but my father, the Iron-Blooded General, thought it was because of the Yun family's extraordinary talent, and he proudly wanted to teach me marksmanship himself! I accidentally broke the steel needle with my hand, but the paranoid beauty thought that I was suffering so much, she cried and protected me behind her, treating me as her darling! Even my sister, who had already seen through my disguise, chose to set up a chess game for me and said to me: "Sister, your enemy is my enemy." This stolen overwhelming love is the warm sun that melts me, and it is also the mountain of knives that kills me! When the devil's instructions collide fiercely with the protection of my family, where should the blade of my knife from hell be pointed? Should he stab an innocent family member, or... Turn the hilt of the knife and face death? !