During preparations for a school event, science enthusiast Makoto Mizuhara, aided by his closest friend Nanami Jinnai, faces off against the conniving student council president Katsuhiko Jinnai. Amidst a tense rivalry, a fateful night unfolds as Jinnai's interference in Makoto's project leads to an unexpected mishap – a portal to a new realm. Transported to the mysterious land of El-Hazard, Makoto finds himself in a perilous situation, only to be rescued by his teacher Fujisawa and the enigmatic Rune Venus. As they encounter royalty and navigate political intrigue, Makoto strives to find a way home, unaware that his rivals Nanami and Jinnai are also entwined in this fantastical adventure.