I got the "Witching Hour" ending upon full completion my first time! I did have to rely on a walkthrough a few times because some of the puzzles and riddles were just too hard for me, but overall it was an alright experience. Unfortunately, I didn't quite understand the story, so I had to rely on the fan wiki for that (I'm still kinda lost though haha).
I'm playing through New Game+ now, hoping to unlock the rest of the CG images I'm missing, plus the music tracks. This game is beautifully drawn, not too shabby for a horror RPG!