A while ago I read this manga that I can't seem to remember if I put it on my list or not and I absolutely don't know the name so I need help

Here's what I do remember....

A group of friends(high school age) gather at one friends house and watch a video a snuff film the boyfriend of the girl main character covers her eyes through the film. Later they start to get really scared because one of the friends parents both die then that friend.At the end we discover that the film the watched had a subliminal message to the viewer to kill all the friends are dead except I think the main girl and her boyfriend and since she didn't watch it she does have the urge to kill. Also the film just disappears off the internet with no traces at all.

Yamitoshi Densetsu first story

Thank you that was it and it was bothering me that I couldn't remember