around 2009~2010, there was an internet urban legend/creepypasta called "This man" on the internet. 

It was a fictional urban legend created by a marketing company, but it was a pretty interesting story. 

A psychiatrist receives a "man's montage" from patients after being tipped off that "the same man appears in their dreams every day" A total of 2,000 people worldwide said they had seen a man in their dreams. 
The contents of the dream were all different, but the faces of "this man" were the same.

this shorts promotion was based on "this man"
If there is a difference, tzuyu is not an urban legend