When seven exceptionally talented Japanese high school students survive a plane crash, they awaken in the medieval realm of Freyjagard. Here, alongside two distinct human races, they form a pact with the byuma Winona and her elven daughter Lyrule to repay the kindness of Elm Village's residents and find a way back to their world. Guided by Tsukasa Mikogami, Japan's prime minister, the group utilizes their expertise to navigate this new society, drawing parallels between their situation and an ancient legend of seven heroes who defeated a malevolent dragon. As they delve into Freyjagard's customs and history, they tread carefully, wary of disrupting the delicate balance of this unfamiliar realm.