The OVA Special which teams the Anime version of the legendary Henshin Hero Jiro/Jinzou Ningen Kikaider with another Toei Henshin Hero Inazuman.  

Mimu Emilton is a cute fourteen-year-old who has come to the annual Starland Festival to become an idol, just like her role model, Yuri. It is the most celebrated event on a united Earth, and Yuri, now the President of Earth, has encouraged people to join the ranks of Excellent Idols. Unfortunately for Mimu, she can never seem to make it to her audition on time, as misadventure after misadventure lands her in situations (usually involving undergarment exposure, I might add) that she escapes with the help of the current Excellent Idols, whom she befriends. Just as she makes her place on the stage and begins her audition, though, an unknown group of aliens kidnaps her and the Excellent Idols. It is only the beginning of a wild interdimensional goose-chase that places Mimu in the position to save the world, if only she can believe in herself. 
(Source: AnimeNfo)

The genius robotics professor, Dr. Komyoji has created Jiro (who has the ability to transform into Kikaider) &ndash; a humanoid robot tasked with the protection of Dr. Komyoji&rsquo;s son, Masaru, and daughter, Mitsuko. Gifted with a conscience circuit, which has the power to simulate real emotions that helps to distinguish between &ldquo;right and wrong&rdquo;, Jiro must protect Mitsuko and Masaru from the evil Dr. Gil who wants Jiro to join his army and aid in his goal of world domination.
 
(Source: Anime News Network)
 
The series is initially a darker version of the original live action tokusatsu show Jinzou Ningen Kikaida, creating or expanding many emotional conflicts within Kikaida and other characters which was not present in the original Kikaida story.

Studio OX