Extra quality versions sometimes separate voice packs. Verify you downloaded all .ogg or .wav files. Reassemble in the voice folder.
This title belongs to a niche genre of Japanese adult animation/manga. Because it deals with sensitive and taboo themes, it is often subject to strict censorship laws in various regions. Finding "extra quality" versions usually refers to "uncensored" or 4K-upscaled versions often distributed on enthusiast forums or third-party hosting sites. Risks of "Extra Quality" Download Links