Before Moldiver's main story OVA series, a Secret of Moldiver! Confidential Encyclopedia! OVA was released. This featured background information into the Moldiver franchise, provided character designs, and cast interviews.

Hiroshi Ozora invents the Mol Unit, a device that makes its user invincible. His plans of becoming a super hero are short lived however when his sister, Mirai, accidently modifies the suit configuration. Now she is forced to save Tokyo by herself from the evil Machinegal and his gang of all-female androids.

[Source: Anime News Network]

The first episode (Go Go! Doll-chan), 12 minutes long, features Mirai working as a rollerskating waitress who encounters the Neophytes in their normal day jobs. At the end we are shown a preview for the 1st Moldiver OVA episode but the text on screen advertises all 6 episodes going on sale. The preview also features a bit of footage that did not make it into the actual final cut of episode 1.

The second episode (Project F), 10 minutes long, features the Neophytes working an undercover gig trying to get a MSX computer for Professor Arnagi's old technology collection.