This is prime example how you should make h-game.
Combat:
It's based on RPGM principles, so turn-based combat everyone either loves or hates but also everyone knows well. It's simple and spiced a bit with ero content as well. Nothing overcomplicated in terms of equipement requirements, builds, magic etc. You don't have to grind as well or, at least, I didn't feel need for it.
Art:
Very nice. Just look at those honkers. Massive badonkers. Serious set of dohoonkabhankoloos. I didn't like some CGIs but overall it's bonkhonagahoogs/10 and of quality I don't usually expect from ero games but really appreciate it when it happens.
Muh corruption aspect:
It progresses slowly but surely, nothing is hiden behind twelve triggers and twenty-something flags and four events so heroine doesn't go from (story-wise) pure maiden into end-game massive cock hungry dick munching semen slurping slut just because developer didn't think through his own design.
Therefore: it's simple, it works, it gets me hard.
Time limit:
30 in-game days but don't worry about it, it's 3x more than you'll ever need. And there is no super sicrit ending when you exceed it, just old plain message that you failed and option to repeat last 20 days with small penalty.
Endings:
So no super sicrit ending with time aspect so we need to collect 1000ml of semen. Also last boss prompts us with this condition, really convenient.
Endings! Two of them, again, nothing overcomplicated. In one you keep your virginity intact, in one you don't. "But maaan, I don't know if I get my cherry popped by this or that monster, do I have to save before each type just to know?" Well yeah, you could, that's thinking man solution. But you could also not to worry and...
Cheats!:
... use ingame cheat system. It's in your house and it also serve as a gallery. Very popular concept in japanese games and I thank them for that. No need to spam f95 threads with "save? full save?" every 10 posts. Who am I kidding, of course people will beg for saves even when you could have everything unlocked whenever you want. To know that simple piece information you would need to launch the game and who the fuck have time for that anyway?
Overall score: good game out of 10, would recommend it.
Simple, great looking, it's not long, gets its point across (and by its point I mean my dick and by across I mean very happy) and you won't need to make spider web out of saves just to get multiple endings CGIs.
If you want to start with japanese h-games you could do it with this title.