Kore wa Zombie desu ka? OVA

Is This a Zombie? OVA, これはゾンビですか? OVA, Kore wa Zombie desu ka? Episode 13, Koreha Zombie desuka? OVA, Kore ha Zombie desu ka? OVA, Kore wa Zombie Desu ka? of the Dead Episode 0, Ee, Kore ga Saishuukai sesuka?, Hai, Encore Arigatou Gozaimasu

Two OVAs released with the 8th and 10th volumes of the original novel. They fall chronologically between the first and second seasons.