Grindy, repetitive, and largely unsatisfying, this game is not worth anyone's time. Unless you really like grinding for materials in randomly generated dungeons and only ever getting a single frame of a sex scene plastered on your screen there's no need to play it.
The "combat" itself is, while unique in an RPGM context, still underwhelming. Either you shoot enemies that have way too much health by constantly backing yourself away into other enemies, or ram into them to get, again, a single JPG of a sex scene and noises from the protagonist.
I liked it at first thinking there'd be more to it but no, that's all there is, and even then the enemy variety is so lacking that I laughed when I looked through the game's files and found out just how little there is to the lewdness of it.
In other words, if you like the art then use a save file and look at the gallery, the "game" isn't worth the time waste.