OVA which was released as a tie-in to the Kandagawa Jet Girls video game for PlayStation 4.

The year is 1580. Using an army of soldiers equipped with sophisticated weaponry, Nobunaga Oda is on the verge of ruling Japan with an iron fist. One of his enforcers is Ginnai Doma - a fallen samurai reborn into an indestructible killing machine. As Ginnai continues his killing spree on ninjas and those who oppose Nobunaga's rule, Shishimaru of the Iga Ninja - going against the Koga Ninja's plans - pursues a one-man vendetta to avenge the deaths of his comrades and kill the immortal warrior.

Wasted from the night before, Kaede wakes up the next morning to find herself at home with a dinosaur she had brought along with her. The two start living together as an odd pair consisting of a typical gal girl and a mute dinosaur going about daily lives. Although not the most experienced paleontologist, Kaede begins to learn more about her new prehistoric roommate through a series of comedic gags and adventures. [Written by MAL Rewrite]

The legend of the Divine Gate is a story told to young children that depicts the merging of the living world, the heavens, and the underworld. "Adapters"—people born with unique elemental abilities gifted to them from the union of these worlds—formed the World Council, an organization which controls the chaos of the Gate by portraying its legend as nothing more than a myth. These Adapters train in a special academy owned by the World Council that allows the students to hone their skills. Aoto, a teenage boy with exceptional water powers and a tragic past, rejects the offer to join the academy numerous times—until he is successfully pressured by the energetic wind user Midori and stubborn fire user Akane. Together, with the World Council and their mysterious leader Arthur, they seek out the Gate in the hopes of uncovering the truth. But in order to reach their goals, they must unite and overcome their own despair while dealing with behind the scene mischief. [Written by MAL Rewrite]