Fappable. That's what I'd summarize this game as. My reviews on h-games are based on this one concept. "Can I preform combat and min/max it then immediately a frame after see my character get plowed and turned into a breeding bed?" Yes. This game can do it, although, it lacks for reasons that hard to put into words. The quality is there, the MC is charming, the mood is set, the story is entertaining...
The gameplay loop. That's what it is; paired with the "reward" being a CG. The CGs aren't bad, by any means; tentacles, looming darkness, the lust and corruption of sharing pleasure forever and being a breeding bed. I personally like the Jellyfish one, which seems to be popular among the commenters too. The MC looks good and her body is mature and young in the right ways so you get to make your own headcanon. So by all means, there's nothing to really complain about, but it feels... uninspired? Lack of a better word, since I do commend the artist and the effort. I feel like if the developer were to improve this game, he'd just need more assets for customization. Maybe black pigtails, or a brunette ponytail? Different eyes or colors? Maybe even the darkness itself could change? Instead of being red and black, make it green or white even? Or clothing swaps? Breast size adjustments? It's so close to being a 5 star but it's missing just a dash of creativity. Still very hot and enjoyable for the player, but there's no reason to come back.