I was going to say something about Edelgard's fat butt in the one illustration or Shera's dumb tits in the one where she's wearing Sylvie's clothes, but then I got the idea to search the artist, Takahiro Tsurusaki, on the 'panda, and found an Azur Lane doujin starring Illustrious (/e49b35c339/) and that's slightly hijacked my attention.
Jesus.
Anyway, Isekai Maou was one of my favorite anime from whenever the fuck it aired. 2018 sometime. Summer? Who gives a shit. I saw a post on /a/ with a screenshot of Diablo with Rem over his shoulder and her ass looked alright, and I was like "Yeah, I guess I'll check this out." Started alright, I guess. Pretty funny. At some point, they were eating dinner in the inn, and Shera's boobs just jiggled all over the place for no reason, and I decided it was funny as fuck, and stuck with the series. And then I actually grew to enjoy the world-building and shit, so good for me.
The series is not unlike KonoSuba, being primarily a comedy, thought focusing more on the ecchi than being a parody of the "isekai" subgenre. As is true for probably too many isekai stories, a big element is that Diablo can't interact well with people, and so role-plays as his character to cope. Not unlike Ainz from Overlord, a big chunk of the humor revolves around Diablo's internal thoughts as he frets over having to deal with people. Often, Diablo would think about trying to get out of trouble peacefully, but then he'll blurt out something cocky about being high above everyone in terms of power, or whatever. This is the main joke in the novel. Doesn't really get "old," honestly, but at the same time I approached this with my brain turned down low, so I wasn't offended by any silliness. I mean, I'm reading a fucking light novel, an isekai one at that.
So the premise is that Diablo was a powerful player-killer in the MMORPG "Cross Reverie" (I'm guessing a parody of FFXIV?) who has been awarded the title of "Demon Lord" and the ability to act as a "boss" enemy in the game, despite being a human player-character. For reaching some checkpoint in the game, Diablo was granted the "Demon Lord's Ring," which reflects magic, making him a formidable foe for other players. He only PKs paired PCs whom he suspects of being romantic couples in real life, and this is pretty funny, but it has nothing to do with what happens after Diablo is spirited away. Diablo is inexplicably summoned into a fantasy world by the Elf Shera and the "Pantherian" (a catgirl) Rem to be a tool to aid in the defeat of Demon Lord Krebskulm (too lazy to double-check the spelling). Unfortunately for the girls, the Ring's effect kicks in, the enslavement magic is reflected, and both girls become Diablo's slaves. This doesn't really mean anything, other than giving the girls metal collars around their necks, I guess for the suggestion of BDSM elements, but this is hardly important in design because it's not like Tsurusaki really does anything too great with the collars, which, what the fuck?, I'm sure the dude has the talent do embellish the eroticism. Like, give a segment of chain to hang between Shera's tits or something, I don't know.
Anyway, it doesn't take long for Diablo to realize this fantasy world is partly based on Cross Reverie but with its own strange quirks that contrast with the game's lore. Enslavement magic isn't a thing in Cross Reverie. Summoners are dogshit character builds in-game, and everyone does Elemental Magic instead, but all mages in this world are Summoners. Everyone's weak compared to the average level of monsters around the game's equivalent of the main town.
Like the aforementioned Ainz, Diablo is so absurdly powerful compared to everything else that it feels like the power gap exists mainly for Yukiya Murasaki to slip in game-based world-building by having Diablo figure out how x element of the new world contrasts with y element of the game. This is somewhat distracting because, like many isekai stories, this could easily just be a straight fucking fantasy series, but, no!, we have to have video game shit. It's not really a big problem, I guess, but maybe I'm just used to the conventions of the genre that I expect MMO references. And I don't even play MMOs, which is semi-awkward. There are three chapters in this novel, each with their own conflict, and everything is resolved by Diablo's brute strength, but Murasaki does well to build the story around Diablo's immense power, such as having a Fallen mage attack the weaker Rem, Celes, and Emile while Diablo is occupied mogging Edelgard.
I've reached the obligatory section of the review where I talk about things that are arguably less important to the overall product. The "fanservice." Which, to me, is one of the more important elements, and really I would say it's rather forgivable to read this novel for little reason other than simply Tsurusaki's art. The anime, as is true for the medium in general, bastardized the original designs to make them simpler to animate. This made the ED a minor highlight of every episode, as the visual was essentially a slideshow of Tsurusaki illustrations (the song itself was fun, too - "Dahling make me happy lalala I need you"), ending with Shera and Rem in like wedding dresses, the blackish Enslavement Collars contrasting wonderfully with the white of their clothing, making more-than-adequate use of the collar's suggestion, if not also raising questions of e.g. the perception of marriage as sex slavery, or something. A good handful of anime would depict lead girls in wedding dresses to, I guess, appeal to otaku viewers who see x character as "waifu." Slapping a fucking collar on them just makes it all the greater, absolutely fucking vulgar, degenerate, truly something to aspire toward. Get sucked into a fantasy world as an extremely powerful sorcerer, may as well start enslaving everyone. Really twists the idea of "power fantasy" into something dirtier. I smirk at it.
Is the next book the one where Diablo has to fingerfuck Rem to spread his mana through her body? That's gonna be funny!