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.

During the 21st century, humanity attempted to colonize Mars by sending two species which could endure the harsh environment of the planet to terraform it—algae and cockroaches. However, they did not anticipate the species' remarkable ability to adapt. Now in the 26th century, a lethal disease known as the Alien Engine Virus has arrived on Earth, and the cure is suspected to be found only on Mars. The problem is, Mars in the present is overrun by creatures known as Terraformars, incredibly powerful and intelligent humanoid cockroaches that mutated from those originally sent to the planet. The Annex I team, consisting of a hundred men and women genetically enhanced with characteristics of powerful organisms from earth, has been sent to Mars on a mission to find the cause of the Alien Engine Virus and to help cure humanity—signalling the start of the crew's fight for survival.

In the dark underground city of Lux, people live in fear and despair under the rule of various criminal factions. Almost secluded from the surface, the gangs' only interaction with the outer world is their mining operation of raffia, which is the raison d'être of the city. Available only in Lux, this rare substance is the basis of texhnolyze transplants that permit humans to replace parts of their body with cybernetic prostheses. The latter have the particularity not to trigger an immune response in their hosts and the Class has the privilege to conduct research on them. This elusive organization, also in charge of the raffia production, delegates its executive authority to a group called Organo led by Keigo Oonishi—a self-righteous man with texhnolyzed legs who is rumored to hear the voice of the city. The fragile balance of powers in Lux is disturbed when a mysterious visitor named Kazuho Yoshii begins committing a series of crimes that puts the gangs at each other's throats. In the midst of the chaos, new actors emerge: Ichise, an ex-boxer mutilated by Organo and recently texhnolyzed by Eriko Doc Kamata; and Ran, a young florist who can see the future. While Lux steadily plunges into insanity, both Ichise and Ran find themselves involved in the greatest crisis the city has ever faced.

Mission T is a secret operation to save the world from destruction. Trained as a ninja from a young age, Botan Negoro, raised to become the ultimate spy, teams up with another excellent spy, Kuruma. Their aim is to recover the legacy of the genius inventor Nikola Tesla, the Shards of Tesla. Can the two outwit the agents of other countries who are also pursuing these fragments? A super-original spy thriller begins. (Source: Kodansha, translated)