A full-length sequel to the 'Kishibe-chou Kidan' short from Outsider: 052 (2010), and its prequel Chapter 2: Kaiki Tokubetsu Tantei (2010). An intern teacher named 'Tomoko Takayanagi' at Kishibe High School has an indescribable and mysterious aura. Two members of a special detective team realize this and start to investigate. As they search for the truth, the strange phenomena around Kishibe High School all seem to be connected to one another.