In
the spring of 1998, a 15 year old boy named Sakakibara Kouichi
transfers to the countryside town Yamiyama. He soon grows suspicious of the fearful
atmosphere surrounding his classroom - class 3. In particular, there is a strange
girl named Misaki Mei who wears an eyepatch and is always alone drawing pictures.

Surprisingly, the end result turned out quite well.
The first half of the series was honestly very creepy. Now, while it wasn't actually downright scary, it is still among the scariest anime I've seen. And that is ...kinda sad actually when you think about it.
However, it's not just some creepy and gory scenes spread out over 12 episodes. There's also a mystery, a couple of romantic moments and some decent character development.
...But it's mainly creepy and gory scenes.