As many others have pointed out, this is basically just a Visual Novel with extra steps. The gameplay here only exists to serve one purpose: Give some sense of "progression" as you grind up stat values to get to the next sex scene with each girl
If you look past the mindless clicking, then the characters and their CGs are well drawn and most were pretty great in regards to the content. I'm a big fan of pregnancy and so going from the girls just treating us as a friend to having all four of them pregnant was very enjoyable. All four of the girls are fully voiced during their H scenes and while some of the dialogue is typical hentai stuff, you have plenty of scenes for each girl that evolve as you raise their intimicy going from simple groping to impregnating them.
The story is mostly uninteresting besides establishing the characters and you'll have about 3 times where the game goes full visual novel mode and puts you into lots and lots of reading before you get back to the usual activities.
I should mention though that there are fetishes present you can't turn off. The main one is pissing, particularly nearer the end of each girls path. I'm not a huge fan of it so I just kinda skipped through when it happened. Append 4 also has one scene where Emma and Chocolat dress up as babies, so that was also a skip for me. Lactation, some Hypnosis and Cumflation are also present, but those don't bother me at all. Still, just know that sometimes you might have to just skip through a scene or two due to this
Even if the majority of the cgs are good and how our character interacts with each girl kept me engaged, it can be hard to ignore how mindless all of the "game" mechanics present are.
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This is how the basic game loop goes:
- Start a day with 6 energy. Running out of energy moves to the next day and uses 1 demon nut. This also raises your "Demon Level" (which for the most part you never think about)
- You need to procure more Demon Nuts to "survive", which you can do with Aira for gold and 2 energy
- To get gold, you either do a Guild Quest with Chocolat for 4 energy (which has some auto battling and 1 button press for a special move), or Training with Liz for gold and 2 energy
- You can also buy potions from Emma which will heal you during the autobattling in Guild Quests, but these cost gold
- All of these activities besides the guild quest are short chibi animations that play for a couple seconds and give you the rewards. The Guild Quest has a chance to be replaced by "found treasure" which skips the auto battle entirely
- All of the above actions raise affection with the characters they are a part of, so your main goal for the sex scenes is to just do whatever each girl has to raise affection and keep demon nuts above 0
- Once you get a relevant scene, you also have to raise their lewdity by repeating "Daily Sex" scenes. Maxing both will let you then spend 3 energy for a (usually) decent H event, and then it starts again.
One major issue with the above systems is that you can never lose this game. If you run out of Demon Nuts, then you'll start the day with 2 energy. This means you can just procure nuts and get right back to the next day without any consequence. If you have no gold when this happens, you can just train with Liz and as far as I can tell this will always give you enough gold to procure demon nuts so at most you spend 2 days and you are perfectly fine.
So without any way to lose, you are mostly just grinding these activities over and over until the girl you want maxes their affection, and then further grinding the Daily Sex to max their lewdity at which point you get a Sex Scene and repeat the whole process.
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The Daily Sex activity is just terrible imo. Repeated CGs of the last scene you just saw with that girl with slightly different dialogue and the UI lies to you. It says it costs 3 energy, but actually it costs 3 energy AND demon nuts as well. It will move to the next day so if you do it at 6 energy then you waste 3 energy which sucks since it doesn't show this when you see it.
There can be downtime for each girls events as well. Sometimes you need a story event to trigger before it'll let you get the next scene, particularly with Aira. You can't just focus one girl as the game will make you raise the affection of the others to get through the story and conclude the game. Also had to do some pretty harsh grinding at the end as I didn't raise Aira enough compared to the other 3 so had to just spam Procure Demon Nuts and daily sex to get her final events (I had tons of gold from S rank guild quests).
Last thing I'll mention about the gameplay is the Auto battling which is the closest it gets to actual gameplay. Guild quests will put you into a fight against 3 opponents back to back where you, Aira and Chocolat attack automatically over time back and forth until the opponent dies or you die with no potions left. While you do guild quests you can find equipment that improves your stats, and normally you'd expect that you need better equipment to handle higher tier quests which in turn give you more gold and affection with Chocolat.
What instead happens though is that you can just buy a ton of potions from Emma and every 2 potions will auto fully heal you during the fight. You are locked out of harder quests anyway until you progress through Chocolats story by which point you usually can just equip whatever and be fine for the next tier with some potions. So at no point did I ever fail a guild quest or need to retreat because I always had enough potions and I just slapped on whatever equipment looked good. It felt like a wasted system and I'm not sure why they chose to add stats and equipment when it doesn't really matter.
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Still, I can't really hate this game because despite its flaws I still enjoyed the events. You can unlock new visuals in the menus with each girl once you raise their affection enough, and the "Talk" button will change what they have to say (although it's almost never worth actually pressing it since it costs 1 energy for 1 affection). The progression of each girl was good for me and each one kinda has their own limits. Aira for example is much harder to eventually have sex with than the others while Chocolat is pretty open to the groping even at the first scene you have with her. I'm pretty partial to games where you don't just start off fucking within moments of meeting and have groping or other teasing.
It's worth checking out the other reviews if you're torn on playing this game, but for me at least I still played the game to completion in about 3-4 hours. I think the scenes this game has are good enough for me to reccomend this, but if you hate the idea of the grind this game has then maybe use a Full Save or cheats.
(Final note, this game doesn't have a satisfying ending at all. Once you max all four girls, the game has a short scene that doesn't really mean anything and it ends leaving you to play through the 4 Append stories which take place before the girls even get pregnant. Very dissapointing)