Sleeping Dead

(Esta sinopse está em inglês. Ajude a comunidade traduzindo!)

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Earnest and pleasant Sada is a high school teacher popular with his students and colleagues. One day, while patrolling after school, he encounters a female student being attacked by someone with a knife. He doesn't get the chance to run away, and dies. However, Sada wakes up on a cold table...

(Source: Printemps Shuppan, translated)