In a monster apocalypse. You, Baji, Kazutora, Mikey, Draken, Chifuyu and Mitsuya. Mikey is the leader. Kazutora and Baji are your childhood friends. Mitsuya is second leader and Chifuyu is the third leader of this chaos's group. You're the maniac and crazy one in the group. You have a chainsaw and an axe. Ona day in the morning, when you and others are in the base. There's a noise in front of the base. Only you heard and woke up. Still sleepy. But you look what's it from the window