Birdy and Tsutomu are still co-existing in the same body, as Birdy continues her duties as Federation Investigator and celebrity persona, and Tsutomu seeks to balance them with his normal everyday life. When a criminal group connected to the Ryunka incident escape from custody, hiding themselves and their alien identities on Earth, Birdy and Tsutomu are thrown back into action. It seems, however, that there are other forces involved, as well as old faces, which give Birdy time to reflect on the past, and the people that influenced her.
 
(Source: Anime News Network)

This OVA connects the first and second Tetsuwan Birdy DECODE seasons. 

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)

A remake of Tetsuwan Birdy.
 
While pursuing a criminal, the pretty but reckless interplanetary police officer Birdy Cephon Altirra accidentally kills Tsutomu, an earthling high school student. To make amends, Birdy is forced to share her own body with Tsutomu's spirit so that he can continue his own life. At first, Tsutomu knows nothing about his situation but soon discovers that his body is starting to take certain actions without his mind ordering it. In times of action, Birdy takes full control of their shared body, transforming it back into her original female form.

Tsutomu, a perfectly average student, is busy studying for his high school exams when he stumbles into a police chase in progress. Caught in the crossfire, the boy is hit and on the verge of death when he's approached by a young woman. Birdy is on the scene and, by joining her consciousness with his, manages to save him from his imminent demise. Now they share a body and will have to learn to live together as she continues her career, capturing criminals and saving lives as an interplanetary police agent.

Tags