K.O. One Re-member (终极一班4) is the fourth installment of the KO One series set in the gold dimension and the eighth installment of the KO series. Continues the story of K.O. One React. Three students from Xiao Ping Guo (Little Apple) High school–Zhi, Liu Chen, and Tai Yang–join the Ultimate Class. Are they friends or enemies? King Lei Ting suddenly goes missing; but, how did she disappear? The Ultimate Class no longer has it's leader. So Gu Zhan, and Zhi Ge; despite their brotherhood, fight one another. Who is the new leader of the Ultimate Class?