This is a series that resembles Hatarakitakunai Dungeon Master in both its dark comedy aspects and having a main character whose ‘weakness’ is often wanting to sleep. Key differences would be a far lesser amount of fanservice (with no weird or creepy fetish focus) and much more haphazard/arbitrary event developments.
What’s somewhat interesting about it is that the protagonist does not gain his powers from being summoned, but rather he’s the very concept of entropy in human form who just so happens to get caught up in a mass summoning event. So while structurally an isekai, it’s more about how all these ridiculously powerful beings in this fantasy world (who have all let their power corrupt them into malicious assholes) just get instantly deleted when they offhandedly try to kill him.
You can’t really get much variety from that setup though, so the author compensates by spending a great deal of time focusing on the actions of those soon-to-be-dead enemies and side characters. As such you’ll get the story of so-and-so which builds up to them encountering the protagonist and summarily dropping dead (sometimes however it focuses on completely unrelated characters; the hero that fails to kill Lain toward the beginning stands out in particular for never showing up again). Which works for the most part.
The main issue is the previously mentioned haphazard nature of the event development, to the point where the author even inserted a New Game+ type of ‘it was all a dream’ reset in the eleventh volume. Apparently this was done because he was told to stretch the story out longer… which does not do it any favors, especially if the upcoming fourteenth novel truly does end up being the series’ conclusion. I just don’t see how all the random subplots introduced by that reset can be resolved with only book left.
