Kyoushoku Soukou Guyver II
English title: The Guyver: Bio-Booster Armor
Japanese title: 強殖装甲ガイバー II
Alternative titles: Bio-Booster Armor Guyver, The Guyver, Kyoushoku Soukou Guyver, The Guyver Act II, Guyver: The Bio-boosted Armor II
Type: OVA
Source: Manga
Episodes: 6
Status: Finished Airing
Aired: Oct 24, 1991 to Aug 21, 1992
Duration: 25 min per ep
Rating: R+ - Mild Nudity
Studios: Visual 80
Producers: animate Film
Licensors: Manga Entertainment
Genres: Action, Horror, Sci-Fi
Themes: Gore, Super Power
Demographics: Shounen

Sho and his friend Tetsurou stumble upon an odd alien artifact while walking through the woods. Then, the alien artifact breaks free of its metallic bonds and enters Sho's body, turning him into the Guyver. With this new power, Sho must do battle with the evil Chronos corporation and their genetically enhanced Zoanoids, who seek to get the Guyver back into their labs. No one close to Sho is safe from Chronos. He must fight. 

(Source: ANN)