Well, it's the game that I thought, what could go wrong despite looking interesting at first? Well, many things that have gone way, way too wrong than I thought- and I'll tell you why you shouldn't waste time on this "game".
So let's start with the story, which...I would call meshup of various ideas and settings, but no logic or let alone a proper explanation to them - you and your friends go on a adventure to cure your sick king, see a bunch of misfortune(s) both on your companions and others, fight many things ranging from dungeon slimes to mechanical cyborgs from another dimension, find out your king is basically a power catalyst and other secrets, the end - for main story that is. Basically average to bad, because overall it is you save the world vibe with no real lessons or you know, proper afterthoughts outside of...boring. Well, expect the post-game story, which while optional, is...just more nonsense, like creatures from another dimension, that can hijack minds to heal their entire army in a instant, girls led by a man and cuckoldry judging from dialogue, and other crap that makes it forgettable.
As for setting, its...again, inconsistent meshup from medieval era underground, to underwater world, to underground castle that for no reason houses a town, research facility and yuri laboratory, then post-game space dimension with no logic, proper explanation or sense to why we are here. It all feels made with no care to worldbuilding.
But that's only the world - the writing on non-main story, including post-game elements is...well, I would say more nonsense - one of a 2 man party gets turned into a female, and one of characters refers to this situation as "being a normie over this", yaoi/yuri fanatism from 2 other tavern folk, then you get communist bunny which is referred as "venom", then a German looking girl with Russian name that says "na zdoroviye", not helped by fact on how offensive the portrayal of stereotyped supposedly Soviet elements is to Russians, especially because of "social democracy" line that gets spoken later, after her battle I think, and also referred as MAN by other characters until you defeat her, despite obviously female face, neither of which make sense, let alone logic of a tank in a medieval fantasy, that quickly becomes something else, and during the post-game segment, one of girls telling about isekai - basically real world tropes in a supposedly fantasy product...Kills off any serious respect for any writing you have.
The gameplay, which is supposedly that should save from game's atrocious(but not exactly the worst)writing, right? Well...it's bad as well - a dungeon crawler with many familiar elements, but no good things to make it better - if not worse - you use torches during early-mid game because your healer needs higher level for the longer lights, go into rooms to get chests because money dependency and fact that enemy groups outside those rooms are the same, just no chest at the end, fight floor bosses occasionally, and do a crap ton of grinding(especially bosses for certain items)if you are playing the highest difficulties - and especially because you really need high tier items that overall cost you more than 1 million in gold total, if you intend to go post-game.
The enemy fights are mostly just kill enemy as fast as you can before they'll overwhelm you, especially bosses, but nothing unique that makes them engaging - considering you lack stats to properly tank them without grinding, and fact it relies on grinding for hardest diffilcuty clears, well...you basically spend time on farming money and resources rather than thinking of proper gear or tactics to defeat your enemies.
There's other bad things with gameplay as well, like minor shops such as casino area and pixel dungeon, which again, both are also nonsensical in a medieval world, but aside from that, the problem lies in fact, that both are very unrewarding for mid-late game - the casino's resistance ring doesn't defend against the effects you want to save against, and the sword gets replaced by much, much cheaper alternatives post-game, and the minigame itself doesn't award more than 6 coins at best, making it a chore that best bypassed with money. The pixel dungeon is basically fight enemies that give nothing but crafting materials to make items that at best, mid-late game material, but suck post-game aside from chicken gun, but since chicken gun can be obtained as a reward from yuri lab(and the best one because others can be crafted for cheap while that one isn't), getting it via craft is time consuming and cost inefficient, because you need the money you can get to spend on high tier gear for yourself and your allies.
The music and sound design is average, heard from many games of this sort, the voice acting, I would say - while a nice touch if done right, it's rather...more annoying, in battles, they overlap every so often when you try to fight fast as possible, nor its exceptional to feel for the character that speaks it - if only more effort on characters relations was made, then it would be great.
The sexual elements are...just random, but all come down to "our heroines do some task by some strangers, get lured into OBVIOUS traps, act dumb when confronted, and so on", then some situations depict them being engaged with enemies that are "just in time" before others rescue them, then a succubus that used digital tech to show events, yuri laboratory with growth/test liquids, and other nonsensical things I cannot explain...
The translation is...considering the Communism venom thing, German looking girl riding a Soviet tank, dumb English jokes, mistranslations like an ability that states to heal all is just a medium heal and so on, well...is fairly decent, but if you count in rather offensive for certain people "historical jokes", I have doubts about that...
There's other minor quirks there, like disclaimer that says that "all characters are 18", but then include lolification of one of heroines, a shota scene, the title menu having a different(but still bad)design of armor for main character, many other things that I wish I could tell, but I ran out of thoughts for this mess, so have what you got.
Well...playing this game from start to end was a total chore, the main story, if you do not mind the sidequests, takes about 4-5 hours, but due to how difficult it is to do that way, on average it takes 8-10 hours, 12 if you include the DLC post-game area, and that all if you do not count in grinding aspect of the game, which becomes mandatory at highest difficulty, which doubles the hours with no good payoff - I'd tell you one thing - you'd rather stay away from this game unless you enjoy grinding while playing absolute nonsense that somehow tries to make itself relatable or serious for that matter. I hope I'll save people who are not informed of what the chore I had...and wont come back.