Are the "scenes" just text with the character portraits or there are actual hardcore CGs?
There are a few, but they take some work to get to. You have to raise relations with the main NPCs, then select "request" to access their sex scenes. Currently Lumira (the mermaid) and Mya (the cowgirl) are the only ones with these, and only the choices without "TODO" beside them. Additionally, there is a random event that can trigger when you enter the Library if you have high enough (~35) relations with Castelia and a scripted one-off when you give Mya a futa potion (you have to have high relations to get the prompt for it and you have to find the futa potion in a (!) event). I believe those are the only ones right now.
As a more general review, I like this game. It takes some getting used to, but it actually has some good content. I've been particularly impressed with the battle system despite it being a little buggy. I'd try to explain it, but that would result in a very long post. Here are some other things I've learned though:
Hope this helps. I actually really enjoy this game. Let's hope it actually gets finished.