Shuuen no Shiori

An ordinary, unchanging high school campus is suddenly shattered by a gruesome murder. A body is discovered severed cleanly in two, leaving behind a baffling and unsolved case that sends shockwaves through the student body. Yet, rather than retreating in fear, the rumor-obsessed students find themselves drawn deeper into the mystery. Their morbid curiosity leads them to participate in a forbidden ritual, setting off a terrifying chain of events that threatens to consume them all. Inspired by a series of massively popular songs originally shared on Nico Nico Douga, this multimedia project weaves a dark narrative centered around an enigmatic artifact known as the Bookmark of Demise. As the students become entangled in the ritual's deadly consequences, paranoia takes hold. They must uncover the true nature of the Bookmark while desperately trying to identify the traitor hiding among their ranks before it is too late. With tensions rising and the final outcome hanging in the balance, the story challenges both its characters and its audience. The path to the conclusion is fraught with deception and danger, leaving one lingering question: can you solve the mystery before the final page turns?