It's an ok anime to pass the time.
100-man no Inochi no Ue ni Ore wa Tatteiru is a "pseudo-isekai", that suits well when you don't have anything better to watch.
The anime don't bring anything new, but if you enjoy this genre like I do, you can watch it to kill some time. I DO NOT recommend this anime to someone who wants something new or a good/great anime.
The story it's ok, the characters are generic and the animation it's barely an ok.
If you need something to enjoy while you don't have anything better to do, this anime it's a good call.