A transfer student to Class 3-3 who refuses to ignore Mei Misaki, inadvertently triggering the curse's deadly mechanisms. He survives the annual deaths and preserves the warning tape for future students.
Chibiki serves as Koichi's principal source of historical and institutional knowledge.
Koichi and Mei ask their teacher Tatsuji Chibiki about the accidents, and he explains the history and rules of the curse.
They cooperate to uncover the truth behind Class 3-3's deadly anomaly.
Koichi and Mei gather information about the accidents, investigate the curse, and search for a way to end it.
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