Episode 1: "To the Land of Adventure!"
On a relaxing autumn day, Shinonome High School was bustling with activity for the upcoming school festival. Mr. Fujisawa, an avid mountain climber and teacher, patrols the school grounds. The entrepreneurial Nanami is working hard to sell boxes of lunch. Jinnai, the class president is neck deep in a scandal. Makoto is completely absorbed in his invention. The whole day seemed as if it would end peacefully, when a problem occurs. Jinnai, who is unjustly resentful of Makoto, decides to interfere with Makoto's invention causing it to run amuck. The machine makes a humming sound and sends Makoto and company to another world. To the magnificent world of EI-Hazard! What fate awaits Makoto, Jinnaii, Fujisawa sensei, and Nanami!?