A fantastic take on Isekai that doesn't rely on tropes to make it enjoyable. Thinking of it as a regular, run-of-the-mill Isekai will just make you hate the show. At its core, it answers the question that we all secretly wonder: how would other worlds deal with overpowered people from another world, and what would you do if there was one that was unkillable?
The show isn't perfect but does an excellent job of establishing the characters it uses. At no point does it try to reach into random dramatic character arcs, it focuses on its story and is straightforward. The synopsis doesn't lie, and while it isn't quite as good, the story plays out like a hybrid of Madoka and Re:Zero.
It's definitely worth the time to watch and even if you don't end up loving it, it doesn't waste your time. Would love a Season 2.