From the introduction:
Youthful school days with Megaranger.
The earth’s warriors, Gingaman.
GoGo Five to the rescue.
Hailing from the future, Timeranger.
Kenta Data, a young high school student, is the champion of an arcade game called “Megaranger”. Due to his immense skill the INET company recruits him into a top-secret project tied to the megaranger game. On the same day he is brought in, the Digital Research Club of Moroboshi High School (the school Kenta attends), arrive at the facility investigating the mysterious research being done by the scientists there. When they all arrive however the INET facility is attacked in a pre-emptive strike by he evil Nezirejia, an interdimensional force lead by Dr. Hinelar under Electro-King Javious I with plans of conquering this reality. Dr.Kubota, the chief of INET, then reveals to the young student that megaranger is not in fact a video game but an actual combat sim designed to uncover those with the potential to become a fighting force against the Nezirejia. He then gifts the youths with Degitaizers which allow them to become Electromagnetic Squadron Megaranger.