Overall quite a game so far [reviewing up to ep.16]. There may be some mild spoilers below, but nothing that will ruin the story.
Story: I'm not a fan of incest (if you are, there's a patch for that) and I think the "friends of your family that you lived with long ago" story in this game works pretty well. It feels like it adds some believable tension between the main characters that the game needs without making everything super creepy.
The story is in-depth and has many branches, which I really like. This is one of the longer visual novels I've yet played and it's not even done yet. Kudos to the author for that.
The father's will and his manipulation adds some additional tension, which is also nice, but I don't think that the conditions placed on the MC make for a real dilemma unless the MC is a real jerk (which he mostly isn't). However, I suspect I know already where the story with the will is going to go and it's not in the direction most of the commenters seem to think (but I don't know this for certain).
There are tons of women to romance and up to episode 16 there is nothing stopping you having relationships with basically all of them, but when you have a game with that many characters it gets really, really difficult to square the circle at the end so you can believably maintain relationships with everyone without alienating everyone. It's a porn game, so that might happen, though I think realistically you couldn't keep that many plates spinning.
There are moments in the game when you can decide not to proceed with certain characters, but it's generally only at the point when MC and that character have developed strong feelings for one another (apart from you never flirting with them at all). I feel like there should be a moment before you love someone (if things started developing in tandem) that you admit you're starting to have feelings for someone else but you also like them, etc.
To me, a key aspect of any story is how the characters react. They need to be true to who they are supposed to be. For example, if Katie, a definite favorite in this story, suddenly went from witty banter and bitchiness to doe-eyed fawning from one day to the next that wouldn't be believable. Thankfully, this story does a pretty good job with character development over time. Of course the timeframe everything happens in is greatly compressed (there's no way even an amazingly handsome guy could seduce and then get seriously involved with something like 10 women in the space of what feels like 2 weeks). That being said, I give games a pass on this, as it is a porn game and no one wants to role-play for months of game time day-by-day in order to see results. I do think, however, that there should be some "days or months" pass interludes so the end results feel believable.
Graphics and Animation: Most of the models are well done, but I think the models for the older characters (particularly Monica and her business partner and friend Zorrah) need some work. Most 3D rendering programs do a fine job with young people models but struggle to give middle-aged or older models the right look. For example, Monica's body is OK but her face (and more specifically her mouth) doesn't fit the body and Zorrah's ass (especially in the early scenes) looks like the surface of a basketball and not natural pores. You seem to be able to avoid romancing them completely if you find the models distracting.
The MC's penis is comically large. The way it is rendered it looks like it is a foot an a half long and quite girthy. I'm fine with MCs having big cocks, but I think this is overdone. Also every woman you meet seems to be able to take your entire monster completely without any discomfort. Sigh.
A word on kissing: This game strives for a mostly first person POV and in such cases the author seems not to want to block "the action" with the MC model, so things like kisses look weird. Like the person is kissing a sheet of glass. I've always felt that switching to a third-party view for things like kisses works best. YMMV.
Sound: There aren't many sounds, but they seem to fit when they happen (like thunder and rain). There's no music. While those things certainly help with the atmosphere if the story is strong enough it isn't a big deal. I'd much rather have a meaningful story than lots of sound and music any day.
Conclusion: This is a good game so far. It will be interesting to see how things unfold as the story continues. I suspect I will need to replay the entire game once it is complete to focus on fewer of the love interests in order to get the best ending possible, but we'll see how it goes.
