TL;DR Short 3-5 hours pixel art nukige about you having sex with your tanned, busty cousin in a span of one in-game month. H scenes are split between well animated pixel art and traditional hand drawn CGs. Overall, a very solid vanilla nukige.
Visuals (4/5)
+Well-designed heroine; manages to hit the sweet spot of being tastefully thick and busty (i.e body size is ideal for for her cup size)
+In-game pixel graphics are nice to look at and the H scenes utilizing this type of graphics are nicely animated
+Inclusion of a few hand drawn H CGs to complement the pixel H scenes
+UI is simple, pleasing to look at, and simply does its job
-While the spritework is good, it would've been better if there were more details and variation added to the usual H actions (e.g in general, you can penetrate her three different ways almost anywhere, but aside from the pumping speed which gradually increases and the option to come inside or on her face, there really isn't much to it, you can't even anal her aside from a few scripted occurrences)
-I know the the heroine's supposed to be kuudere-like but her H sprite could have been more "expressive" while still maintaining her personality (add a few trembles or squints and the like)
Audio (5/5)
+Godly sound design and attention to detail (e.g moans echoing a bit when you have sex in an enclosed space; footsteps changing SFX depending on what "material" you're stepping on)
+Heroine's seiyuu does a good job as a kuudere-like little cousin, nothing really too off-putting to warrant admonition
+Copulation SFX here is better than the average; for some inexplicable reason, I really like how their anal sounds here...it actually sounds hot and it's not like your usual squishy finger-in-a-cucumber type of sound
~Not much in the way of ambient BGM or any BGM as a whole. It depends on you whether it's great or not but I'm fine with it
Writing/H Content (4/5)
+It's a nukige! Thankfully the game knows this and goes straight to sex after establishing the bare minimum needed to have a premise.
+Sex is sex just like how fun things are fun. What I mean is that there's no unnecessary dialogue during H; its just about the heroine feeling it and her moans. It goes straight to the point. No unnecessary discussions about the virtues and vices of Machiavelli.
+Wholesome vanilla content for those who needs a break from all the degenerate content they consumed
+The conversations between you and your cousin are okay. (At least it isn't too stiff or awkward and there is progression as your relationship deepens)
-Pretty limited dialogue between you and your cousin outside scripted events
-There's really not much for a story here if you're looking for something with more meat (what's wrong with you, the heroine's meaty enough and you're still looking for more?)
-The sex is all vanilla and it's just you and her in the usual different positions. The kinkiest the game ever got was probably the outdoors sex or the anal but other than that, it's all happy, handholding, PEGI-3 compliant sex. You can't parade her around town naked, you can't play with toys, and y-you can't even threesome!
*Though I did list that down as a negative, I really don't take it against the game because that's like expecting ramen from Burger King. Just wanted to put this out here in case someone was in the mood for those and was hoping for some of that here.
Gameplay (3/5)
+Simple and easy-to-pickup gameplay loop: just walk around, interact with objects to unlock new stuff, talk and have sex with your cousin, increase her stats, then hit the sack
+Interactive pixel H scenes where you have some degree of control during the action
+Despite the limited time of one in-game month, you have way more than enough time to do what needs to be done so the game is calming, peaceful, and stress-free.
-In fact, the in-game time of one month might be too long. There isn't much to do to warrant that length and I actually find myself sleeping through about a third to a half of the game's days.
-Skipping text isn't as snappy as other H. I had to hold down ctrl while mashing my left mouse button.
-Controls are pretty limited: you're bound to your mouse when it would've been nice to use the arrow keys for example to move around from time-to-time
-The action buttons in the game overworld sometimes feel wonky: to repeatedly talk/H with your cousin, I had to pace around a bit before the prompt shows up; another example is in the love hotel, the button prompt to H her shows up before you even reach the exact spot where you can do it
-No visual indicators as to what objects in the game are interactable
-Similar to above, no visual cues as to which areas are traversable (in my case, it took me until I was 2/3 into the game to find out that there was a small room to the left of the living room)
-Might be hard to unlock all the H scenes naturally because some of them have strict requirements (e.g I had a hard time thinking of where to use the swimsuit. First choice was the bathroom but no new special H scene appeared. I went through every room in the house until the prompt to special H her appeared...and it was in that unremarkable small room to the left of the living room. Do note however that this is mitigated by the game giving you a way to unlock all H and even if you don't use this method, the gallery has hints as to how to unlock your missing H scenes)
-Commonly encountered a bug wherein you and the heroine would just freeze up on the screen if you fast-travelled to an area while she's nude and she's NOT supposed to be nude there. Fast travelling home and anywhere else still makes them unresponsive and my workaround for this was to fast-travel to the residential area. After doing this, the flag that the main heroine should dress up would hit: she gets embarrassed, promptly dresses up, then you'll have control over the game.
Would I recommend it?
Yeah! As a nukige it goes straight to the point and the art is really hot. If you came to cum then you'll be closing this game with fewer children in your ballsacks. I had this game's gallery in my phone for a very long time now and I still come back to it every now and then. The gameplay itself is pretty meh and might be clunky at times, but it's not that bad that it ruins the game itself.
I could see some people getting bored of this, especially if you weren't in the mood for vanilla. If that's the case, I recommend you play this game some other time. That is, once you're in the mood for it.