Takeshi Hongo is a promising young man with a passion for motorcycle racing. However, his dreams are suddenly ruined when he gets kidnapped by Shocker, the evil secret organization planning to dominate the world. After being remodeled into a cyborg, Takeshi escapes and swears to protect the world from the inhuman monsters.

It's been a long time since the great war between the Three God Generals and the Youkais, an ancient race of monstrous spirits. Since then, imprisoned in a cave protected by the mystical Seal Door, their leader Daimaou and his Youkai army wait, planning for the day they can finally strike. That day has arrived and it is up to the Kakurangers, along with the Three God Generals, to defeat the Youkais, before Daimaou's villainy destroys Earth!

To protect innocents from ever-evolving crime, three souls burn brightly! This is the story of the Special Emergency Investigation Unit, striving for love and kindness in the Earth of tomorow!

Hyperspace Boy Wonder Seven is a fictional tokusatsu, mentioned in TV series Giant Robot Mikazuki. This single 25-minutes episode of the "Wonder Seven" was released in 2001 as bonus with the "Tekkōki Mikazuki" DVD-box.