Well, this came out of my backlog next. I have to say that, given the Dev's 1st game, I didn't have very high hopes for it being anything other than an ok time-waster. The first game after all was pretty bad as a game and wasted way too much of your time with RPGM silliness. On top of the fact that it was, for the most, way too linear to be worth it being anything other a kinetic novel. There was absolutely no proper usage of the fact that it was in RPGM.
Which is why this game surprised me, a lot. The dev implemented completely different systems, worked a lot more on the story and actually made room for meaningful choices. I genuinely did NOT see it coming. Even if this wasn't the dev's second game ever, this would still be a pretty great game for the NTR genre. Sadly, it has a number of issues that keep it from being downright amazing, but it's still pretty great.
Now, let's get into the nitty-gritty of things. Mechanically speaking, this game is more of a puzzle game of sorts rather than a classic RPG. While the game might fool you into thinking it's a classic RPG on account of gear, leveling and having a party, the fact of the matter is that what matters most is time management and the order in which you do things. At least, if you want to prevent the NTR completely, or at least keep the girls from being corrupted. You have a limited number of actions per day, a limited quantity of funds, and a limited amount of time. On top of that, your ability to level up and gather money depends on going on missions, and the number of enemies on a mission is limited too. This means that you can't really grind for levels or stretch things out for time.
Furthermore, the more time passes, the worse things get when it comes to the girls' succubus blood thing, which makes it increasingly difficult to use them as party members or keep them satisfied. On top of that, the game hits you with several curve-balls as part of the main story which can completely fuck you over, and there's no real way to prepare for any of them without prior knowledge or possibly save-scumming. There's no way to predict the Touka and Nana thing, and generally, it will pop up before you're able to handle that boss unless you're also on top of the Explorer side-quest. There's also no way to predict the 25k Gold incident, which has multiple traps in it, simply due to the number of days it takes. Both of these can screw up a run in several ways. Add in the item shop girl on top of everything else and yeah, it's really easy to mess up.
That's all to say that while it IS possible to get the BEST ending on a 1st run, it's quite frankly impossible if a guide isn't used, on account of the fact that the order of everything matters.
Getting a good-ending where the girls aren't corrupted by Mark and one of them ends up with MC is perfectly doable though, though it's unlikely that most people will be able to pull that off AND some other side-stuff.
The game has NG+ though, and it lets you select what you bring back, to an extent, in NG+, so there's multiple ways of making a new run and using what you learned in the previous run to get a better ending. Which is great as far as I'm concerned... though not as great as it could be.
As mentioned before, the game has issues that keep it from being truly amazing. One of those issues is the fact that, while the game has 2 sluts in it as the "girlfriend candidates" for the protagonist and that said two girls are supposed to have some differences between them aside from just cosmetic ones... At the end of the day, the game barely leverages that. What I mean by that is that for the most part, both girls have the exact same H-scenes with the bull (Mark) and also in terms of side-content. They go through the exact same steps when it comes to falling to the dick, and depending on timing, it's entirely possible to have basically the same event play one after the other with minimal differences. Hell, Mark's dialogue with each girl is mostly the same (eg. rating their pussies as 96 points for each girl at the exact same step in the exact same moment of the scene...). On top of that, the game almost never leverages the fact that they're twins and almost never has the two of them properly fucked at the same time.
In fact, there's only THREE scenes where the two of them get fucked at the same time properly, and not just one after the other in a more extended scene. There isn't even a single double-tit-job (in spite of the fact that the game constantly reminds you that their boobs are big)...
The most variation in terms of scenes you get for the two is through two exclusive side-jobs. Lyne's Blacksmith job and Elza's nurse job feature completely different scenes for each girl. (Also a reward for the MC is you complete the jobs... but that obviously involves the girls getting fucked) Basically, the only thing that having 2 girls adds is more complexity to the management side of things (but you could mechanically make that happen through other means) and some arguable drama in the story, but it's not leveraged properly at all in terms of hentai. Worse, it makes dealing with nights tedious at times, instead of exciting, because you get what's essentially the same event twice over.
The other issue the game has in terms of multiple playthroughs is that aside from the aforementioned curve-balls, it's pretty damn linear. The events for the girls with the bull are completely linear and always happen in order no matter what once they start. There's no skipping no mix and matching, no nothing. The game doesn't even account for where they start off in terms of the Lewdness stat, which affects their judgment. It doesn't matter if the girls start fucking Mark at 30 Lewdness because they hit the Libido cap, or if they start fucking him at 80 Lewdness because of some other reason, they'll go through the exact same chain of events in the exact same order and it will take the exact same number of nights for them to fall.
Likewise, progression through adventurer ranks and whatnot is subject to the same problems. You don't have a selection of missions that you go through, you have to complete them in order to advance in rank and repeating the missions of a rank doesn't allow you to advance, you HAVE to do the full set for C,B,A,S and you can't mix and match in any way. This means that unless you skip days, it'll always take a very specific minimum amount of time to rank up every time. You have some variation in terms of side-jobs... but the issue with the lack of uniqueness in events for the girls makes that less fun than it could have been.
Luckily, once you know what you're doing, doing a run doesn't really take that much time, and on top of everything else, you can unlock the full gallery whenever you want after getting an ending, though this doesn't give you access to the "post-ending" world to properly see things in context... though this primarily only matters for the bad ending world. Though some of the others also have a bit of context to them that might be worth watching if you care for more than just the H-content.
Moving on, before anything else, I'll comment on the translation... which is... ugh... tolerable if you really have too. It's clearly MTL and there's been enough editing that it's not a word salad, but it could have used quite a bit more work to properly have all the pronouns and whatnot used correctly. Some weird choices of words could have likely been corrected too. Quite frankly, I hope that a better translation becomes available eventually, or at least that this one gets full, proper editing pass so it all reads like proper English at least. This game definitely deserves the effort as far as I'm concerned.
Now, with that out of the way, the story. As the description for the game states, it's a story about a dude, the two girls that love him that he can't pick between and the situation they end up in that leads to the two of them potentially being fucked away from him. The whole thing hinges on the fact that the two of them have succubus ancestry, which awakens after they have their first time with the MC, and which puts MC in danger due to the strength of their libido. The only fix for this is for them to acquire a pair of Golden Apples, which can be used to dispel/suppress curses, and said apples are fairly expensive. They don't really have an option, because their mother, who had the same problem when she was younger, literally fucked their father to death. (Now, why exactly the stupid idiot didn't think to warn her daughters that this might be a problem, the game doesn't really explain... Well, aside from the fact that we wouldn't have a game if their mother had a brain and the capability for foresight...)
With that problem in the way, the three head to the capital to become adventurers and make enough money to get a pair of Golden Apples. During this time, the girls' lust must be managed or else it becomes uncontrollable and literally deadly, and they have to account for the fact that the power of their blood becomes stronger over time no matter what. On top of that, they run into S-Rank adventurer Mark, who offers to help, and he's TOTALLY not intending to take advantage of the situation to turn the girls into his personal cock-sleeves, totally.
All in all, it's a pretty decent set-up story-wise. The virgin MC on a time-limit vs the Chad S-Rank adventurer... The only thing I don't personally like is the fact that the MC has a micro-penis that's LITERALLY smaller than the average thumb. Dunno about other peeps but it makes every single H-scene he's in annoying to go through. Beyond that, it makes Mark's achievement of corrupting the girls into not much of an achievement, on account of the fact that the MC simply has no chance whatsoever even if he worked at it for a billion years. No amount of skill would compensate for that difference in size with a pair of girls that are succubus-blooded, and the game makes it pretty clear that for their type, size DOES matter because getting their wombs rammed HARD makes a huge difference. So a huge stomach-bulging dick would always be better.
That aside, the game does sprinkle various other things around the two of them, expanding on the setting somewhat with some subtle and not so subtle additions. For the most part, the setting is extremely fucked up with legal, but hidden slavery and other various things. Also MC's mother being a fuck-slave for a noble dude... though how MC didn't recognize his own mother during that one moment, I have NO fucking idea...
All in all, the story doesn't have any particular plot-holes tbh. It's internally consistent, which is a rarity for NTR plots, but it works in a fantasy setting with magic and all that jazz. Obviously, I'm not counting the MC's inability to recognize the girls under various circumstances as plot holes, that's pretty normal for NTR, and in several of those circumstances, perception alteration could have been at play to an extent.
The H-side of things is pretty great too for the most part, aside from the faults mentioned earlier. The smut goes from zero to 100 and beyond pretty fast with the bull, starting off with penetration right off the bat... but that's fair given the whole succubus blood thing that's in effect. Likewise the side-jobs that have H-stuff in them escalate pretty fast, but it makes sense internally, so that's not really a problem. Lots of hard-fucking. Lots of ahegao. Stomach bulging with Mark. It's pretty nice. There's even some side-girls who show up and get fucked under various conditions too, good or bad. There's quite a bit of content to enjoy... just... not as much as the gallery might make you think there is on account of the doubling up thing. At the end of the day, in many cases, if you see a Lyne event, you've basically seen the Elza event too.
Here I'll mention another weak point of the game... and that's the male perspective thing. Basically, the game offers you the option to play things from just Al's perspective, which drastically reduces the amount of stuff you see unless Al himself sees it. Al doesn't get to see most stuff. There's bunches of events that happen outside of his view. There's this memory crystal thing that you get access too that Al can spend money on to see various H-events, all of them censored in a way with the girls' names partially hidden and their faces hidden etc... but it's honestly not a great system. Leaving aside how much content isn't in that stuff, the fact that Al has zero reactions to any of it makes it pretty uninteresting tbh. Unless you're really into self inserting and "mystery" NTR stuff, I genuinely do not recommend to stick to Al's perspective, it's just not worth it.
That's before getting into the fact that it makes no sense for MC to spend money on that stuff before the ending when he's already struggling with the libido of two succubus blooded girls...
Honestly, all in all, this is a pretty great game. It has its faults, it could have used some more work to be genuinely amazing, but if you're into NTR and the art isn't too janky for you, then this is definitely worth playing. Hopefully, it gets a better translation at some point, I'd love to replay it with better English.