KO One Return (????2) is the fourth of the Zhongji series, continues the story of KO One. It was aired on December 26, 2012. This series is a midquel of K.O.3an GuoWang Da Dong is on his way to transporting Liu Bei to the Iron Dimension when a timequake sends them both into different places of time. Da Dong wakes up to find himself 10 years later in the Gold Dimension, where he and every known power-user of the last generations have gone missing. Worse, his powers have somehow disappeared.He then infiltrates the new generation of the Ultimate Class to investigate the reason, but runs into trouble with the new leaders.