Three Cheers For Sweet Revenge

Angela was my friend who I wanted to give anything to and thought more precious than my own family. I eventually turned Angela, a lowly aristocrat from the countryside, into the flower of capital society. But it was betrayal that came back. She sold me and my family to become an imperial princess.
"...did you have to go this far?"
"Because I wanted you to be unhappy. I wanted to take your whole life away."
But when I thought I had died under the guillotine, I was surprisingly