This is a really solid game, overall if you don't dislike femdom then you can enjoy it quite a bit, as a game we have a fire emblem style game combined with a bit of seduction during combat.
However if there is something that makes me a bit sad is that it copies too the chapter style and this game had a lot more potential. One of the things that truly shine in this type of games is adding a bit of the strategy aspect in the sense of territories.
Let me explain myself, during the game you follow a one way only story going from place to place while the succubus forces are advancing however you can only visit those places once and in fact it gives the feeling that after you defeated the succubi there they... don't attack again, overall if you made the maps into territories that could be controlled by human or succubi side just changing offensive and defensive side for me it would have already improved the game.
Even more in that model you can add more significant enemies and encounters, you can actually make certain succubi as "generals" and that can become recurrent enemies until killed, in fact the own creator knows that it is interesting and in a way he added it, because some powerful succubis you meet in early chapters you have a final showdown with them in a later chapter.
Continuing that line I have to say that perhaps having too many different succubi enemies can feel redundant, overall unless they have a really different concept compared to other succubis I don't think they deserve to be an unique enemy, not that it is bad to do it as the game does, but compared to other choices to the gameplay and more unique enemies it feels secondary.
The reason about why expainding the strategy element would be nice is because of the recruitment of units and the increased strength of succubi, incluiding but not limited their drain abilities to get stronger. Even more there are some maps that are more enjoyable because of the actions of the succubus!, for example related to the elves they can be transformed into succubus so each falled ally becomes another enemy, this game literally asks for more strategy and territory stuff rather than chapters.
But if there is one part of the game that is fully disappointing is the cities and villages. The reason is simple, the MC can get his stuff stolen, be it money or weapons, his units stolen too but it doesn't add anything at all to the gameplay, it would actually be nice to be able to meet more those characters in the future and show how they do stuff with what they got from you but nope, it's a bit of sex with penalties.
Lastly something to point out is the stuff related to fetishes, mostly the game focus on three; oral, breast and feet, however the development related to those fetishes is just minimal, it's literally a status for the character making it more difficult to deal with certain characters. On this point it feels really vanilla for succubi but well, even so I would have liked to see more importance to fetishes.
As a last note, it's a nice and interesting game to play, it definitely deserves 4 stars, I just feel it had more potential than what it is but well, that's about it.