Summary: Set in the Gold Dimension and happening after the events of KO One 3. The leader of the Ultimate Class, Lei Ting, has gone missing. Now, the class needs a new leader, and best friends, Gu Zhan and Zhi Ge fight for the position. New transfer students from Xiao Ping Guo High School come along and join Zhong Ji Yi Ban. Together, they find Xiao Ci, who looks very much like their leader, Lei Ting, suffering from amnesia.

Main Characters:

• Gu Zhan
• Zhi Ge
• Qiu Qiu
• Na Ge Shei
• Zhi
• Liu Chen
• Tai Yang
• Xiao Ci

Other Important Characters:

• Jin Bao San
• Hei Long
• Wang Ma Li
• Shen Mi
• Xi Xi
• Zhi Shui
• Du Gu Lang
• Bass
• Xiao Ci's Grandma
• Lei Ting
• Xiu

About Gu Zhan and Zhi Ge's "family history":