Tetsuwan Birdy Decode: The Cipher

Birdy decides that Tsutomu's painfully slow romantic progress needs outside help, and uses her celebrity identity to push him closer to Sayaka. What begins as an awkward attempt at matchmaking becomes far more dangerous when a Federation marionette enters the situation.

With Birdy and Tsutomu still sharing one body, a simple personal favor quickly collides with interstellar business. The incident forces them to juggle school, Birdy's public persona, and a threat that hints at the trouble awaiting them next.