I wouldn't recommend it. The first few dungeon zones are fine, but then as a prank it gets a massive spike because the game expects you to grind stats.
And then it spikes another five times.
The back half of the game is honestly a pretty shit game, especially for a porn game. Doubly so when you get a lot of back to back dungeons that... do not have enemies who do lewd things to you. That was the point when they took off the "ha ha this is a porn game" mask, I guess.
Yeah the game does seem to expect you to do some grinding on "Severe". I think many people playing are probably neglecting the 'tactics' that let you autobattle weaker critters. You'll save yourself a LOT of time that way, I recommend it. The boss fights can be frustrating but I personally prefer that to the half-assed cakewalk that combat in this kinda game usually is.
And honestly... there's only so many variations on monster rape you can do. I frankly prefer it this way. The creator was clearly a lot more interested in showing Alcy getting banged by guys instead of goblins and tentacle monsters so that's where he focused, while putting in the obligatory monster defeat scenes for players who want to see that.
I don't think you can rightly complain about this "not being a porn game". I've played rpgmaker erogames that don't have a third of the number or variety of scenes as this one.