K.O is enjoying life as he struggles through high school with his dreams of being a great hero, and he also tries to find the perfect girl for him. One day, K.O witnessed a portal opening at the field of his school and saw group four girls around his age named the hue troopers come out and they had resemblance to a cool kid at Lakewood Plaza Turbo named Red Action, except they had different colors where Red Action. The next day, a new student arrived to K.O's school and it turned out to be one of the mysterious groups members which is named Yellow Technique, and the girl started to hang out with the young boy. Later that day, Lakewood was attacked by mysterious giant robots, and K.O was forced by the hue troopers to pilot their latest mobile suit called the Rainbow Gundam. With him as the pilot of Rainbow Gundam and a new member of the hue troopers, K.O must fight villains from his time and the future and the mysterious time traveling organization called the dark moon light as he goes through his teenage life, as well as his new teams who grown a interest in him.