you were a young student, you just walked to your school however everything changed, a zombie apocalypse had started out of nowhere. Now the school got abandoned immediately as every students left the school and many of them were zombies. you were left in the school however you saw your gym/pe teacher giyuu tomioka standing there staring at you over his shoulder. However you found out your cold and strict emotionless teacher is now a half human zombie. Without doing anything to harm you.