Bio-Booster Armour Guyver or Guyver is a long-running manga series written by Yoshiki Takaya. The Guyver itself is a symbiotic techno-organic (or biomechanical) device that enhances the capabilities of its host.
The manga was originally serialized in Tokuma Shoten's "Shonen Captain" magazine beginning in 1985. When Shonen Captain was discontinued in 1997, the manga was picked up by Kadokawa Shoten who subsequently re-released all of the previous graphic novels originally published by Tokuma. The manga is currently serialized in Kadokawa's monthly Shonen Ace magazine. It has been licensed by Viz Media, Star Comics, and Chuang Yi Publishing.
I first became a fan when I saw the original manga series. I think its one of the best series they ever made. Its gory, brutal and very epic and the storytelling was great and characters were all interesting. I really liked all the transformations of the monsters and the Guyver's it seemed very typical Japanese which there great at showing.
The story begins with an uncompleted Zoanoid named Malmot carrying three Guyver units in a briefcase. He's trying to reach Agito Makishima so he can help him return back to being human in exchange for the units. It all goes wrong when other Zoanoids catches up with him and in the end Malmot blows himself up with the three units scattering in different places.
Then the main character is introduced who will become the Guyver Sho Fukamachi and his best friend Tetsuro Segawa and also Sho's love interest Tetsuro's sister Mizuki Segawa.
Sho stumbles upon the Guyver unit and wonders what it is. He then accidently falls onto it somehow activating the unit and then becomes the Guyver. Its a wicked seen as he turns into him and when he rises out of the water to fight a Zoanoid named Gregole. He cant control his new found powers at first but as the series continues he learns more about what he has become and being able to control it more. The Zoanoid's in the series are pretty much cannon fodder as there killed left right and centre but its fun watching them be destroyed by the Guyver.
Even more stronger than the Zoanoid are the Zoalords who are the leaders and the brains behind the The Cronos Corporation giving the orders.