OUTTAKE

n. An outtake is a portion of a work that is removed in the editing process and not included in the work's final, publicly released version.

These are the stories behind the story. And no, you don't really need to read Neverland but i would really appreciate it if you do. 

By the way, you can read Neverland here: http://www.asianfanfics.com/story/view/1266393/neverland-fnc-youngbin-inseong-dawon-sf9