Help!

I totally forgot the name of this manga! So the main story is about this boy who in his first life was born without his arm. And he falls in love with this witch. The witch antagonizes people so that they can band together to kill her. Basically she does this so that everyone one can get along. So boy and the witch decide to have a life together but he ends up dying, but ends up being reborn. And this cycle keeps happen. Where he comes back, they are together, and he dies. It gets to the point we’re he gets executed in one life and it drives her mad and she ends up going to another world and becoming a demon king. And he ends up being reborn as the hero. It’s a really good manga! So if you can help me out! I would be super happy!!!!