Based on the the manga of the same name. Guyver: Bio Boosted Armor tells the story of Sho Fukamachi. a normal student who stumbles upon an alien weapon while on the way from school. the weapon known as the guyver is being sought by a company known as Chronos who's members have the ability to change into large monsters known as Zoanoids. when stumbling Sho merges with the weapon and becomes an armored hero. Sho must now fight Chronos and its bid for world domination and must stop his friends and family from being hurt in the process.