The dead began to rise unexpectedly, and Japan was plunged into complete disarray. Takashi Kimuro is forced to kill his best friend when he is bitten and joins the ranks of the walking dead as these creatures terrorize a high school. They almost escape their death trap of a school, vowing to protect Rei Miyamoto, the girlfriend of the guy he had murdered, only to be confronted with a civilization that has already disintegrated. Takashi and Rei soon join forces with other students on a trip to find their family members and discover what triggered this massive outbreak. They are joined by Saeko Busujima, the lovely president of the Kendo Club; Kouta Hirano, an otaku with a penchant for weapons; and Saya Takagi, the club's secretary.