Welp, this joins the list of games that just isn't for me. I'm not particularly big on puzzle and explorations focused games like this one, but I'm not necessarily against them either. However, this one makes things worse through the fact that it has very little actual H-content, and on top of that, said H-content is rather nonsensical with short and meh scenes that in some cases seem to have been forced in there just to have some H-content or some such.
Furthermore, you can find the gallery room pretty early in the game if you start doing side-quests, and all the content, little of it as it is, is already unlocked. Now, you could obviously ignore the gallery room if you wanted too... but what's the point when there's barely anything to find anyway.
On top of that, the translation is pretty bad. Not the worst I've ever seen, but pretty damn bad, and the game is nowhere near good enough for me to put up with it tbh. It'd be one thing if it had great gameplay or something, but it's just "ok", I'd say, even for those that are specific fans of this type of genre. The lack of H-content and its poor quality obviously drag it down much further.