Just finished this game and I gotta be honest, I wouldn't recommend it to anyone. It feels unfinished and like the dev didn't really try having someone else playtest his game before releasing it.
The largest problem with the game is that its most lauded feature, the story, is hidden behind a five hour slog through repetitive, grindy combat with punishing game overs all while saving is discouraged. You explore barren environments that contain a single enemy type, one monster girl, and one boss, and until you beat the final boss there is no story given besides the personalities of the girls, which is very minimal anyway. Even if you use the debug tool it would be a bland walk through pointless stretches of empty space until the very last part of the game where you choose endings.
Let's say you don't use the debug tool though, then it's your generic RPG maker game. The gameplay is simplistic and usually works. When you unlock new girls and skills there's brief enjoyment and satisfaction as you overcome a boss that previously seemed impossible to overcome. However, throughout your journey there is no guidance and it's very easy to not play the game in its intended linear fashion and you'll likely be punished for not having a high enough level if you don't correctly guess the direction the dev laid the game out in. I don't actually mind this, but with a save system that discourages you from saving the game often it can be frustrating and feel like a time waste.
Finally the endings didn't satisfy me for the amount of time I put in. I did the major ones but can't be arsed to get the seventh character now. I did a blind playthough while I was sick and the game kept me busy. I'm honestly a little surprised reading the thread now to learn some people like this game as much as they do. The game did have a draw for me when I was starting because everything was so mysterious, but eventually I realized the mystery is because the dev didn't want to flesh everything out. Things exist because they do. Ultimately it feels like the plot to a dream, you're just thrust into it and you try to make the best of it. I appreciate that the game is unique though, that is what drew me to it and kept me playing. I don't mean to shit on the dev, I might even try out his other games sometime.
As a final note, there is NTR in some of the endings but I did not feel any attachment to the girls so it just made me laugh. I laughed at all of the endings, come to think of it. Maybe it was just the feeling of relief of having finished this game.