821 is a Filipino paranormal/suspense/thriller story in the M-Series. It revolves around the college life of Joan Marquez, and a mysterious entity that keeps chasing her wherever she goes, and starts killing all of her closest people one by one. The numbers '821' has a significance in the ending of the story.
Read the full story here.
The story was a proposed script for one of Kazaki's college classes, but it was turned down, sadly.