Senritsu Kaiki File Kowasugi! Preface: True Theory, Yotsuya Kaidan, the Curse of Oiwa

Fifth mockumentary file in the Kôji Shiraishi series, titled "Senritsu Kaiki File Kowasugi!". From the team's previous work, director Kudo is now convinced of the existence of parallel universes. But now, a new video posted convinces the group to learn the truth about a mysterious woman with a swollen face.