I need some help again. I saw a review for an anime about (I believe) a princess. Her kingdom is attacked and she is killed by (I think) a prince. She is reincarnated as her infant self and decides to live her new life in a way that makes her happy this time. But on the same day, she is killed by the same man. She repeats this process multiple times, living each new life in a different way. She retains all her memories through each reincarnation and gains new knowledge and experiences each time.