This is pretty good fun if you're after mother/son incest. It has lots of different scenes, each having at least one or two variations. There's a wide variety of different scene types all themed around building a lovey-dovey sexual relationship with the mother. The art is really nice, though I would have liked to see some animations. They would have made "good" into "great".
The large amounts of H-content is the main draw, as the game part is only OK. Stock standard JRPG combat that mostly just comes down to being a numbers game. Outside of combat the gameplay is "exploration" (read: choose the obvious path or the side path with some items) and collecting crafting materials. It's got a cheat option in the gallery if you wanna skip most of it, and having played through properly (with a little bit of grinding) I can't say I'd blame you.
The story is nothing mindblowing, but it's good enough for what it is. It doesn't take itself too seriously, but it doesn't go the route of calling itself out or becoming parodic. It's light-hearted and fun enough for the length of the game. The character interactions feel fairly natural (for an incest hentai game), even if things move pretty quickly on the incest front.
The translation is serviceable, but nothing good. Many item descriptions overflow the text boxes, and the standard MTL issues abound (inconsistent item names, occasional incorrect pronouns, etc).
SFX wise it's standard RPGM fare. There are wet sounds for the scenes, but no voice acting, which feels like a missed opportunity. Even just some moans would have been nice.
All up, the game as a game is fine, the story is all it needs to be, and the translation is as MTL translations are. The H-content is varied and plentiful, with pretty art. I dunno how much I'd recommend playing it legit, but the H-content is worth playing for even if you don't want to cheat. You aren't going to get the next big H-RPG that blows your mind and you play for 70 hours, but you probably won't regret your time, especially if you're only in it for the H-scenes.