Season 1

Takagi Masaru (Mamiya Shotaro), the leader of Class 6-1, unearths a time capsule for the first time in 22 years at a class reunion. Inside is a yearbook in which six students have been blacked out. The six students, who…

Takagi (Mamiya Shotaro) and Sonoko (Araki Yuko) were classmates in Class 6-1. After a class reunion, the two find themselves embroiled in a serial murder case targeting six people who have a connection to Sonoko. In ord…

"Next, Nico-chan will be the target!" A series of murders hits classmates one after the other. Takagi (Mamiya Shotaro) is investigating the truth, and his premonitions come true, with a third victim! Who could the culpr…

"This can't be a coincidence." A series of murders strikes classmates one after the other. Takagi (Mamiya Shotaro) and Sonoko (Araki Yuko) investigate the truth and are convinced that the next target is "Chomage" Hadach…

"Mr. Otani might remember something." Takagi (Mamiya Shotaro), Koyama (Morimoto Shintaro), and Hatachi (Mori Yusaku) become the targets of a serial murder case targeting their classmates. Unable to figure out who is hol…

Sonoko (Araki Yuko) becomes a suspect in a serial murder case!? While Takagi Masaru (Mamiya Shotaro) and Saruhashi Sonoko pursue the truth of the case and work hard to prevent a fourth victim, the situation takes a sudd…

The body of Otani Noriyo (Akama Mariko), the homeroom teacher of Takagi Masaru (Mamiya Shotaro) and Saruhashi Sonoko (Araki Yuko), is discovered. Not wanting to involve anyone further, Takagi pushes away his former clas…

"I will never forgive them" -- The culprit of the serial murders was the forgotten seventh member!? As Takagi Masaru (Mamiya Shotaro) and Saruhashi Sonoko (Araki Yuko) pursue the truth of the case, they suddenly remembe…

"Who is the culprit?" Semi-final! Tonight the culprit will be revealed.

"Who is the real culprit?" Final episode! All will be revealed tonight.