Yuki Takeya, Kurumi Ebisuzawa, Yuri Wakasa, and Miki Naoki decide to stay over at school. Along with the school adviser Megumi Sakura, they suddenly find themselves to be the final survivors of a zombie attack, and continue to live and survive at the school.

After the sudden disbanding of the legendary group Mugen, who used to control the town, 5 new groups appeared. Sannoh Rengokai (Hoodlum Squad), White Rascals, Oya Koukou (Oya High School), Rude Boys, and Daruma Ikka, took control of the town on their separate territory, and the town began to be known as the SWORD area. When they tried to protect their town from the yakuza organization Kuryu Group,...

Yuki Takeya, Kurumi Ebisuzawa, Yuri Wakasa, and Miki Naoki decide to stay over at school. Along with the school adviser Megumi Sakura, they suddenly find themselves to be the final survivors of a zombie attack, and continue to live and survive at the school.