Mikan receives an email from Toru Makami (Takayuki Hamatsu), a video streamer of supernatural stories, requesting that they investigate the mysterious death of a high school girl that occurred six years ago. It is said that the ghost of the deceased high school girl haunts the school... Sukui (Yuna Taira) is enthusiastic, but for some reason Saruwatari (Ryuhei Maruyama) refuses to investigate. Sukui goes alone to question Kobayashi Tanukiko (Nozomi Miyabe), a friend of the deceased Usami Aiko. Meanwhile, Saruwatari learns of an unsolved case... When Sukui returns to Mikan's room looking tired, Saruwatari...