Jinki:Extend - And Then... is a single OVA episode released in 2006, serving as the thirteenth episode of the mecha sci-fi series Jinki:Extend. The series centers on Aoba, a girl who loves building robot models. After her grandmother dies, she is kidnapped and taken to a secret base holding a giant robot. Piloted machines there battle Ancient-Jinki in the Grand Savanna, though the real purpose of these fights is kept hidden. Aoba works hard at the base in hopes of one day piloting a robot herself and uncovering those secrets.