First things first, this VN nails the overarching story and character dynamics. The engagement and payoff of corrupting the heroines is excellent. For a netori game, the plot is quite nuanced - it clearly takes inspiration from the more thoughtful half of Japanese H-games. The art is mostly well-done, too. It's a clear 5 stars. If the game's description seems appealing to you, this is an easy recommendation.
However, it's also far from perfect.
Regarding technical aspects of the writing, there are plenty of errors, sometimes immersion-breaking, sometimes confusing enough to force you to go back and reread a few lines. Characters are not at all explored equally, with a heavy emphasis on the 2 main LIs introduced at the beginning (Cecille & Sera), and even between those 2, Cecille receives much more focus for most of the game so far. There is also a vague sense I have that the writer didn't quite figure out the details on whether to thoroughly degrade the women - making it clearly 100% fantasy fulfillment - or to explore the concept of consensually submitting as a form of empowerment - shifting the theme to more of "real" BDSM. The story definitely leans towards the latter, but there are many holes. For example, the MC frequently loses himself to his supposed "pretend role" of conqueror without the character or the narrative acknowledging it. A few scenes later he then clearly acknowledges he's "just" playing the role and has all this internal moral conflict... There's too much whiplash.
Speaking of the MC, he's a bit of a weak point of the story. Although the plot justifies his actions and how OP he is, with a tragic backstory to boot, it fails to really develop the MC or distinguish him as anything but a Gary Stu. Even as the story tries to subvert the Hero trope, the MC himself is an equally "chosen" individual with many unearned privileges. The weak opening arcs also contribute to this. The main LIs conveniently are "cursed" before the story even begins, and Cecille's solution after however many days and weeks of struggling with the issue is to get dangerously close to Ending the World by engaging in forbidden sexual acts with a man other than the Hero. Basically, some critical steps were skipped here.
As for other aspects besides the writing - the minigames are mostly mediocre. The training sim bits have some nice art, but otherwise all the games are clunky, repetitive, and often buggy. The art is well-done, although the dev clearly has a bit of a bias towards unrealistically huge T&A. Unfortunately it appears they've begun to use AI-generated art at least partially, which is jarring because the style shifts dramatically, but the bar for quality doesn't seem lowered yet. Sound design is lacking but not offensive, some stock BGM and SFX are used at appropriate times, nothing really high quality or original.
