It seems that in the full version the first monster girl (forest fairy) is bugged and you won't get her scene after losing. Interestingly, though, the scene works fine in the public version. So it seems that this bug is present only in the paid game.
Viewing post in Yorna: Monster Girl's Secret comments
Hello! No, it's not a bug. Leary’s scene was cut because of her looks. Yeah, we all know that she’s 118 old, but rules are rules.
Previously, there was the “back to original” patch, but there’s no such thing for the current version. A lot of time passed while I was trying to restore the game in Steam and it got a lot of changes meanwhile. When Yorna finally got back, I no longer had the project for the old public version to make such a patch. The hard drive that had it died, and I didn’t bother with putting it on the online storage since up until the finish line, I had no idea how many changes I had to do to pass all the extra checks on the game.
That’s why the old public version is available “as-is” and I can’t perform big changes on the old versions in general. To be honest, it’s not a big loss. Especially if you think about the new art packs for other girls.