Hour of the Zombie Vol. 2 (manga)

It started out as a normal Monday at sixteen-year-old Nikaidou Akira's school, until some of the students went berserk and started eating each other for lunch... Now Akira, Furuchi and Umezawa are on the move to uncover the origins of the zombie outbreak and to figure out what they should do, as it appears no outside help is coming.

As the hostilities between zombies and students grow and threaten to destroy the school, Student Council President Houjou must enact dire measures to ensure that no more student lives are lost...but at a terrible cost.