A high school teacher, loved and popular with female students.

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)
 
Note: Includes two bonus chapters.

Extra chapter of Sleeping Dead published in Canna Vol. 100 as part of their "Bangai-hen" Tokushuu (『番外編』特集).

Seiji Sada