Alright, to add a bit of a counterpoint to great review by
Zappky
I felt really frustrated with the game, imo, the worst from the dev, and that's saying from someone who really likes the setting and heroine and whatnot. And that's not to say that the game is bad at all. But just as it was said above, it felt like the author didn't have a clear objective and cut corners in a lot of parts within the game.
First of all (1), the muh gameplay aspect, its clear that he put a lot of focus into that, with the virgin first run type of structure, which to begin is a long shot from his previous game where getting lewd is almost canon making progression easier, but the actual difficulty gameplay element is actually that good, there are a ton o hard to get items that felt useless because afterall you can't use them all, there is no much magical elements to unlock but which again felt useless because most of the enemies don't even have a elemental weakness, making it feel like a complete waste of effort wasting souls. Speaking of Souls, I definitely think the author was inspired to try and make something Souls like.
On the hentai front, it felt like something that was way more detached from the main story than his previous games, which in turn would be perfect for a magical girl setup. You can see several scenes that content appeared to be rushed, and at the same time it even feels like you have to go way out of your way to try and trigger a scene, very unintuitive or even obscure ways. Of course there were more than few really good scenes, but after having to fumble around whatever reward you would get for the scene turned into frustration. There are definitely those scenes that felt really lazed out, like the exact same cg and sometimes even dialog for one tier to another, its made evident that it was either rushed or cutoff from content.
Summing all in all, like I said it isn't a bad game at all, but it felt like a big missed ball from what could've been with his previous games in mind.