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

An unaired OVA episode of Kore wa Zombie Desu ka? of the Dead. It is the 11th episode and was bundled with the sixth volume of the manga.

Nana Episode 11.5: Junko's Room Nana Episode 21.5: Junko's Room 2 Nana Episode 36.5: Junko's Room 3

As the war temporarily calms down and Edo rebuilds, Gintoki finds Shinpachi—who is still unaware of his return—on a bridge. However, as a fight quickly breaks out between the Yorozuya and the Tenshouin Naraku, suspicion grows, forcing Gintoki to use what is nearest—a loincloth—to mask his identity. Saved for the time being, Gintoki enters the Yorozuya office, but unbeknownst to him, someone else is already waiting there... Meanwhile, Kondou departs Earth to marry Princess Bubbles in an attempt to improve diplomatic relations. After boarding the Gorilla Amanto mother ship, he realizes that he doesn't speak their language. Confused, Kondou tries conversing with them, only to inadvertently gain their support. However, someone associated with the princess crashes the ongoing ceremony. Will the wedding continue, or has Kondou just been saved from becoming the next Gorilla Prince? [Written by MAL Rewrite]