Yagi Takeru's ordinary life shattered the moment an earthquake tore through his school. When he awakens, the campus has transformed into crumbling ruins that look centuries old. His classmates and teachers have vanished without a trace. Fleeing with childhood friend Oosu Seri and Asuka Shiratori, Takeru discovers the entire town has become a ghost town. Then figures wrapped in cloaks appear before them and reveal that they have been carried into another world. Orphaned young and raised by Touma Rokunosuke, head of the household that took him in, Takeru is a kendo student surrounded by people he cares about, including his best friend and rival Yamato Takeshi and the Shiratori sisters. Blending adventure, drama, fantasy, romance and the supernatural, the story sets his friendships against the dangers of an unfamiliar world.