From the blog "Clephas' VN home"

Now, I've said this several times before, but AXL is a company that reuses its art, music, and character designs/features heavily.  As such, I rate their games solely based on plot/story and how those elements are used (in other words, jackasses who point out the somewhat dated art style and recycled music can go sodomize themselves with a pickle for all I care).  Unless you are a bigot who absolutely has to have the latest art styles, this shouldn't be something that bothers you anyway. Ou