I love it when game devs here try making unique game mechanics, especially when they succeed. The game is genuinely engaging even without the sex. The character writing is also a cut above the rest. Pailas story was especially good, and the art is just as good as the rest of the game.
As far as I noticed the game does not have a leveling system. Instead you progress through improved equipment and better understanding of game mechanics. This made many encounters feel like puzzles, where they had a solution where you didn't have to take damage. The exception to this were high HP enemies with basic movement, where there was no real solution except either wailing at them with your weapon or use items. This is fine, you have HP for a reason, but it was sad when these enemies were so common. If there were creative ways to deal with slimes, crabs and skeletons I would enjoy the combat a lot more. Maybe slimes can't attack the same turn they split so you can clean them up with a spin attack without taking damage. Perhaps crabs have just enough HP to die to a heavy weapon. If you do that you can have a hard mode without regeneration, which I would play. Also hiding in grass is way too strong. It made the fourth dungeon easier than the third.
The game has sex scenes fairly early on in the questlines. For Paila and Nanako, they had engaging motivations and interesting personalities that this was engaging and hot. For other girls, it seemed like they mostly just like sex, which is fine but not nearly as engaging. I would be fine with extending the time it takes to see a sex scene once the game has a bit more content. Also it is a bit weird to have sex with Yuu when I don't think she even knows what pregnancy is. Most people will be fine with it, but it would be nice to have an option to slow down. I also got the Viola bug, so I can't speak of her questline.
Art is great. All characters are very busty, which is great but it would be nice with a little more variety in body types. But I think the dev is on that already.
Great game so far, especially for being so early in development.