Do not misjudge Tearmoon Empire as an Isekai. Although most fantasy that has come out are fantasy, this isn't a fantasy... You could even say that this has no fantasy element besides regression. The story can be comedic and sad at the same time, this story may not have stunning animations like Frieren but it certainly is a hidden gem. Give it a try and don't let the opinions of others who said it was trash Isekai fool you, had they said that then they haven't watched it. Judge the anime by yourself and decide your thoughts on it...