Aku no Koujo wa Mou Dare mo Korosanai

Candace was so tyrannical in her quest to be loved, she earned the nickname of "Demon Princess" and was eventually executed as a result. But after her death, she wakes up to find that she's been thrown back in time. If it means avoiding such an ending, Candace will do anything. She'll give up her quest for love and even behave completely unlike herself if she has to!