This short story by Junji Ito is about a fault that appears in Amigara mountain after an earthquake. The earthquake exposes countless human-shaped holes in the mountain which seem to have been made about a thousand years ago. People, intrigued by these
silhouettes, gather at the site and that’s when things get creepy.
It’s about a 15-20 min read, but if you haven’t read this before, you’re in for a treat. Link above.
