The episode titles are the dates of the year during which that particular episode takes place. Episode 1 "121045" is 12th October, 2045 and so on.
The series was originally going to be called "Neverland", but that title had to be changed due to copyright issues. Other working titles that were considered were "Eternal Children", "Neverland of Betrayal", and "The Way We Survive in this World".
Before season 2 debuted, this series was #90 on IMDb's Top 250 TV Shows with a rating of 8.8.
While season 1 is a faithful adaptation of the manga, season 2 cut out multiple fan favorite arcs and characters.
Directed by Mamoru Kanbe, who directed the infamously violent and dark series Elfen Lied.