Is this the darkness of our time? Or is this the true nature of people? SNS" is a fun and convenient service that allows people to easily connect with others. Adults are aware of the dangers, but children who have just started using SNS...a junior high school girl started a social networking service under the name of Koharu, and was contacted by a middle school teacher with a smile. But he pretends to be an entertainment producer...? There are vile adults who target innocent children on social networking sites. These people are monsters. This is a nauseating and shocking "behind-the-scenes" drama depicting the truth and reality of "social networking monsters" who are more innocent than children, but filled with a dark, black darkness!

Detective Shiramine loses her mother in a mysterious murder case that's afloat at the crime scene.While searching for the murderer, her daily life changes drastically when she meets Saihara, who is in charge of the case.What is the truth that is entwined in the red rope?(Synopsis from /r/RED_Es on Reddit)