20th Century Boys20th Century Boys.

20th Century Boys (Japanese: 20世紀少年, Hepburn: Nijusseiki Shōnen) is a Japanese manga series written and illustrated by Naoki Urasawa. It was originally serialized in Shogakukan's seinen manga magazine Big Comic Spirits from 1999 to 2006, with the 249 chapters published into 22 tankōbon volumes. A 16-chapter continuation, titled 21st Century Boys, ran in the same magazine from 2006 to 2007 and was collected into two tankōbon volumes.