20Th Century Boys. As the 20th century comes to a close, people around the world are worried the future is changing. Kenji Endo is a regular manager of convenience stores who is simply trying to get by. But when he discovers that suicide has unexpectedly been committed by one of his old friends called "Donkey," and that a new cult headed by a man known as "Guy" is becoming more infamous, Kenji starts to suspect something is wrong. Kenji realizes, with a few key clues left behind by his deceased friend, that this cult is much more than he ever thought it would be— not only is this mysterious organization directly targeting him and his childhood friends, but the whole world also faces a grave danger that only the friends will have the key to stop.