Based on the real life serial killings of Futoshi Matsunaga.
The original Japanese title translates into English as "Scream in the Forest Without Love", which seems a much more appropriate title, based on the subject matter.
Based on a real criminal case, named "Kitakyuushuu Serial Murder Incident", taking place between 1996 and 1998, and the main culprit of it, Futoshi Matsunaga.