[DeepL Translation - needs review] Volume 1 Introduction: The corpse was hung in the shape of the letter "Y". The body was hung in the shape of a Y with fake wings on its back. The room was locked up. The entire discovery of the body was recorded on video. The title of the video is "Φ (phi) is broken. Is this a challenge? Moe Nishinozono, a super graduate student at N. University, and her fellow students, including Yamabuki, take on the challenge of solving the case!
(Translator: DeepL)
