The story revolves around a grand "impersonation" revenge plan carried out by the entire family against a businessperson who leaked a fabricated video of their second daughter engaging in "papa-katsu" (a form of compensated dating) with her male teacher, which led to public condemnation and her subsequent suicide.
Haruna Tsunematsu is studying folklore at university and she decides the subject of her graduation thesis will be the "Kisaragi Station" urban legend which has been a hot topic on the Internet since 2004.