Story:
Basically 13 short little stories based on Japanese urban legends or myths. All of them were interesting and in my opinion, done well. Every story is at the very least, creepy (some were downright scary), and it had me hooked from the first episode.
Animation:
At first this was a sticking point to me. The animation was extremely basic, but after a few episodes it grew on me and actually it fits very well with the asthetic of the show. The animation is based off of the Japanese paper theatre story tellers. It is done well for what it is trying to do.
Sound:
The sound is done very well and adds to the general vibe of creepyness and is unnerving at times. The Story Teller's voice animation is done excellently and is very creepy.
Characters:
Can't really say anything about this because each story has its own characters.
Overall:
Definently scary and worth watching.