After the destruction of their Japanese branch, Cronos abducted Sho Fukamachi's (Guyver-1) father Fumio and his girlfriend Mizuki Segawa. Sho was called out by a group of Cronos troops who used Mizuki as bait for a trap to capture the Guyver. Sho co-operated and he and Mizuki were handcuffed together, meaning if Sho tried to bio-boost, the energy field he creates on transformation would vaporise Mizuki. Sho's soon-to-be ally Masaki Murakami came to the rescue but the Cronos troopers zoaformed and attacked him. As Murakami attempted to lure the Zoanoids away, he tried to warn Sho that Mizuki may not be who she appeared to be. A wary Sho tricked "Mizuki" with a question about her birthday. "Mizuki" blew it and so transformed into Gelpess and attempted to bite Sho's head off. Sho transformed into the Guyver and the shockwave he produced obliterated Gelpess.