English Gakuen Shinshoku XX of the Dead 02 | 学園侵触 ×× of the Dead 下巻

And the world is attacked by guys and is violated―― Sudden thing of grotesque that attacks the world. When humans are predator they become zombies, becoming a tentacle human when parasitic. While panicking all over the world, Kenichi Matsubara is barricaded in the school with friends and teachers.

But that guys gradually erode in a school and attack the friends. And attacked friends, gives oneself completely to pleasure and fell down...