I've always found the stories behind the scenes of media to make that particular piece much more interesting. A horror manga I've loved is PTSD Radio, a collection of very short horror stylized like searching for the right song by turning the dial of your radio, only for these short bursts to be interconnected. Turns out the entire time the creators were experiencing similar ghost horrors in their homes and office. Other pieces of media include games like The Binding of Isaac or Undertale...