元婚約者は可愛いだけの妹に、もう飽きたらしい (Associated Names)

I, Charlotte, the daughter of a count who was raised strictly by my parents to be able to do everything, became engaged to Leinhardt, the legitimate son of a duke. My sister Milim cries that it is not fair. She claims that I am the reason why she is sick. Leanhardt, who had long been…