From left to right: Yoshiaki Maeda, Mitsuru Yamanoi, Gou Iwakura, Masafumi Yoshioka
Apocalypse no Toride, or Fortress of the Apocalypse. Why the weird name? Because the story focuses on four guys in a juvenile reformatory center, a.k.a. Shouran Academy, which is one of the few safe places left in Japan. This isn't your typical everyday citizen slaying a zombie manga. This about four guys who were sent to a juvenile reformatory, each because of a different reason, slaying zombies.
The story starts out with a news cast of a murder case which resulted in an officer's death. It was reported that the officer was attacked by a man who went berserk and bit him in several areas. The suspect in the case is Yoshiaki Maeda. Unluckily for Maeda, even though he didn't do it, he was just at the wrong place at the wrong time. He saw the scene take place but was too horrified to do anything about it and fled. Maeda was witnessed at the scene so he was apprehended, interrogated, then sent to Shouran Academy.
Once he reaches Shouran Academy he is interrogated again by the warden. He tries to tell the truth but fails to because the warden "knows" he is lying (some japanese adults don't care much of what younger people say). He is given a futon and sent to Cell 4 where he meets his three cell mates: Yoshioka, Iwakura, and Yamanoi. Cell 4 gets into some trouble with guys from another cell and both groups are sent to outside to run. While they are running a police van crashes into a pole nearby and they go and check out what happened. A bloody person gets out of the van and the guard who was watching the group decides to take the person to the infirmary, and that's when all hell broke loose.
He who fights with monsters should see to it that he himself does not become a monster.
When you gaze into the abyss, the abyss also gazes into you. -Nietzsche
-Apocalypse no Toride