This was mentioned a couple months ago. I checked it out yesterday at a friend's house -- the tone is kind of interesting, a lot different than the first preview (which was linked to back then) suggests.
The second preview (linked above) gives more of a feel of it. It's in the "isekai" genre, meaning he's in another world. Specifically, his fantasy world merged with a cyberpunk world in a way that is glossed over (those details are rarely important in the isekai genre.) so the main guy is presented as a "fish out of water" in a somewhat comedic way. Like the 2nd preview shows, the guy's a demon lord, but he's in a cyberpunk world, and to gain "followers" and thus gain power he becomes a streamer. Yeah, like a video game streamer. Anyway, it's the sort of thing you have to be in the mood for. I only watched a couple episodes while gaming, specifically of the "dubbed" version.
Here's a "recap" of the story of the first couple episodes: https://www.youtube.com/watch?v=FBG65MT33og You'll note some shots reminiscent of Ghost in the Shell and Akira.