Tetsuwan Birdy Decode: The Cipher
English name: Birdy the Mighty: Decode OVA
Genres: Action, Comedy, Sci-Fi
Type: OVA, Episodes: 1
Aired: Jul 22, 2009
Studio: A-1 Pictures
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
Birdy uses her pin-up alter ego to help Tsutomu make a love connection with Sayaka, but everything goes horribly wrong when a Federation marionette is added to the equation!

(Source: FUNimation)

This OVA connects the first and second Birdy the Mighty Decode seasons.