Shockingly worse than i was expecting, despite how attractive it looks and plays at first. Because there are short games, and there's this, a microscopic game. So short in fact, that after beating the final boss i've gone through the game again to see, maybe NG+ does give you more events? But no, it doesn't, it just allows you to start again, but with your items and stats. Plot is also all jumbled up, i thought it will be explained in NG+ too, which it wasn't as well.
If there's good hentai content, it's kept behind losing to monsters and repeating the same events a lot of times. I didn't find it, because there was NO way i would lose to the trash mobs. Unless you do that, you'll get:
1. Your sister getting raped, for what you have to make an, admittedly, not a completely obvious choice. If she gets raped, you will have a choice to go to rapist as well, which is an idiotic choice
2. Shota will harass you - but ONLY if you think about him
3. Your sister will kiss you
4. A handful of bathing scenes
5. In-battle rape attempts, where it's nearly impossible for enemies to succeed, you HAVE to choose not to resist. Purple slime might actually get you, which would result in a short tentacle rape
6. Sexy sausage-eating at the town, like actual food sausage, but sexy
7. MCs nudity here and there
That's it... that's the whole content you will get. And for that you'll have to play a short, randomized "labyrinth", with locations in-between. Yeah, randomized in such a short game, meaning there are even less hand-crafted places with content. Unsatisfying in every way possible, a waste of time to play, if you will. No plot to enjoy, no game to play, no cool bosses, no cool characters, no justified hentai, not even a lesbian sister ending... I suppose Lamia Knight isn't bad, she gives you a lot of gifts, annihilates goblins if you say the right choice, and walks away like a hero.
The game feels like someone started making a big game, and then suddenly decided to abandon it, but for it to be "finished" the dev just quickly made an ending and moved on. I would recommend you to do the same - move on to the next game.
BUT IF you're willing to intentionally lose to enemies, then maybe you'll find this game much more enjoyable(fappable). So if you're that kind of person, you might want to try it, it's short after all. Otherwise definitely won't recommend.