One day, an elementary school child named Yuuma tries to jump out of his classroom window. His classmate Hina stops him and, in a bid to stall for time, asks him, "Do you know the round of a hundred ghost stories?" Hina tells Yuuma about a ritual where, if you tell a hundred ghost stories, you'll see ghosts afterward. Learning this gives Yuuma a new lease on life. Chapter by chapter, he shares ghost stories with the reader, slowly but surely inching his way toward one hundred...