I have played the two other games by this developer, Ark of Artemis and Last Embro. Honestly though, I can't remember that much about them. But playing Zerachiel made the general feeling seem familiar. There are some...I wouldn't say hardcore, but certainly quite fetishistic sex scenes in the game. Early on for example you can choose to have Zerachiel be subjected to several days of gangbanging.
The art is pretty good, so the sex scenes are nice to look at, and to some extent they are hot. Zerachiel is quite affected by being screwed, the art sells it well. And Kujilab have this text to the side that for instance displays whenever Zerachiel orgasms. Many RPG porn games track sex statistics. This one doesn't do it that well in my opinion. Compare it to, let's say Enicia and the Contract Mark, and it is obvious how undeveloped that part is in Zerachiel. I find the lust crest hot in itself, but here it is just an excuse for Zerachiel to act like a slut. There are basically no corruption progression, it goes from 0 to 100 in no time. That's not nice.
At least there are some conveniences. Most quests are easy, though I would have liked a few longer quests for the variety. Once you beat a floor of the 'dungeon' you can teleport to skip already beaten floors. It is relatively easy to get money. Leveling up is rather slow though. And the dungeon floors are unnecessarily large compared to the content they offer. In other words, they feel empty. The game itself feels a bit empty, or incomplete I guess. Wish there was more hot stuff to do. The developer could take a cue from other games and allow the lust crest to slowly develop based on your interactions in the world, and such.