What's the noun for fanfics? Here's the word you're looking for.
fan fiction
(uncountable)Amateurfiction created by fans, incorporating the characters and concepts of a commercial mediaproperty, typically without permission from the author or owner.
“Quality fanfic that makes me fall in love with the characters all over again, makes me squee and giggle and email everyone I can think of who'd like it too.”
“One of the beauties of fanfic, especially netfic, is that the story can be just exactly as long as it needs to be.”
“Intriguingly, one runs across name-mocking more in fanfic and other fan art.”
“Ask her about her favorite ships. Does she like Dramione, or Romione? Ask her why, and if she's written fanfics about them.”
“Those of you who have read my fanfics will know that I am a Rocketshipper.”
“They regard us, sometimes, as bad writers because we don't use our own canons, when, in fact, some people's fanfics are much more enjoyable than novels.”