After a massive meteorite crash on Earth, a mysterious alien capsule dubbed the 'black box' triggers the formation of 'Project BB,' an international research initiative. At the nearby International Academy, eight boys, led by Manabu Yoshimura, find themselves lured into an experiment by their teacher, Toukichi Hashiba, who promises them academic credit. Tasked with entering the meteorite's eight chambers with strong human thoughts, the boys envision a colossal robot, triggering a startling chain of events. A spaceship descends, bearing an alien named Wercury from the Star of Prokimasi, demanding the Choshin people's meteorite. As tensions rise and battles loom, the boys must unite their disparate wills to pilot the transforming robot, 'Gakusaver,' against the alien incursion. Can Manabu and his friends synchronize their efforts to safeguard Earth and thwart the Prokimasi threat?