Once, a brave student banished all the ghosts haunting a school, but now these spirits have returned, seeking vengeance. Satsuki and Keiichirou Miyanoshita, siblings mourning their mother's tragic death, relocate to her hometown. Their new school, rumored to be haunted, proves the frightening tales true as the ghosts target them. Together with their feline companion, the siblings and their friends navigate the eerie challenges of surviving the school's spectral inhabitants in Gakkou no Kaidan.