catboys are ruining my life's Manga

Iris had met a world of despair, everyone she trusted betrayed her. Moments later she died by the hands of her husband. Iris reincarnated into modern earth and lived a peaceful life until the age of 20/21. And this time, she reincarnated back into her past life! And this time, she will have a happy and successful life, bringing down all of those who betrayed her. I really like how Iris sees her past mistakes and she always has a way to solve them. Her character is so lovable and the art is really nice, it's visually pleasing. I truly recommend it.

Ianna is a beautiful red-head swordswoman who was treated poorly by those around her. Around the age of 15, she left the estate she was living at and went to become a swordswoman, joining the 1rst prince of the neighboring country, Ianna dies at his hands and reincarnates back to when she lived at the estate. The art is full-colored and really beautiful, our MC is a really strong female lead. I would like for the manna and magic to be explained a bit more (since in every universe manna and magic work different). Instantly, the author does a great job to want to read more about what happens to Ianna. Do recommend.