After reading an exceptional story a fan will experience a sensation of emptiness that cannot be filled. The only known remedy is time. While not a completely pleasant feeling. It's a signifier that the story just read connected deeply in some way. The bigger the void the bigger the effect the story had on the individual.
Person 1: "I feel sad after reading this book/game/movie."
Person 2: "It's the readers void. It's get's easier if you focus on the next book."