The Grand Duke’s New Daughter-in-Law is a Bit Fierce

I was a soldier in the Republic of Korea Army Special Forces when I died during training. Then, I was reincarnated into a novel. The problem? I was now just a five-year-old child. If my uncle catches me, he’ll only use me before ultimately discarding me. To survive, I must twist the original story and escape. So I decided to seek refuge in the Grand Duke’s household. “Will you become my daughter-in-law?” “If you protect me, I’ll do my best. Sir!” But… why did my old soldier habits come with me? I was just trying to stay loyal to the Grand Duke’s family and live a quiet life, but for some reason, everyone started loving me. In fact, they loved me so much that discipline began to crumb...