Mysterious warriors appear to blast Miki into another dimension! She flees her captors only to find herself trapped in a world of monsters and madmen who plot the downfall of Earth. The only power that can possible save her (and the world) is that of the mysterious Mask of Zeguy. Miki must embark on a life-or-death quest for this talisman, with the villains who kidnapped in hot pursuit!

Life seems simple for Kouichi, a young student, until he learns that he is the reincarnation of an alien protector who crashed onto the mantle of responsibility as "defender of the Earth," Kouichi/Babel teams up with a trio of super-powered alien companions to battle the the dark forces of an evil cult leader. The war to save humanity takes Babel from the deserts of southern Asia to the upper east side of Manhattan and ultimately to a final showdown with "the master" in a hidden base nestled in the Swiss Alps. The action is fast-paced and deadly. The fate of the world rests in the ability of this courageous youth to tame his latent psychic power and use it to defeat the enemies of mankind. (Source: AnimeNfo)

As a baby Jiro was delivered to his foster parents by a massive oni, who said he would return for Jiro in 15 years. When the time comes Jiro must contend with enemy oni, dark cultists, and their minions while attempting to protect both his parents and girlfriend from their depredations. Ultimately he must embark on a journey through the past, future, and other dimensions to embrace his destiny as Shuten Doji reborn.

Short specials included on the BD/DVD volumes of "Sekai de Ichiban Tsuyoku Naritai!"