Although Akane Ninamori terribly fears ghost stories, her high school's newspaper club tasks her with the investigation of local haunted spots. To overcome her phobia, she enlists the help of Fujino Amemura, a mysterious transfer student who does not have many friends and is often alone. Together, the two girls explore the rumored areas, discovering the mundane reality behind what seems to be nothing but myths.

Yoinosaka—a town of tangled walkways and never-ending staircases—is filled to the brim with otherworldly tales that have stood the test of time. As Ninamori and Amemura's after-school escapades continue and their bond deepens, their harmless exploration may lead them to genuine supernatural presences lurking around forgotten corners.