Bacillus tries to locate and eliminate Birdy, while she, Tsutomu and Tute argue over the constant separate lives that they were trying to hide from the public. Tute gets wounded by Bacillus before he gave Birdy an Elemental Destructor capsule bomb to kill Bacillus and eliminate the threat of him killing an Earth-born civilian in Japan. Birdy mourns Tute's death when he can't heal his wounds from Bacillus' attack.

A string of murders with dead female victims with short hair and glasses leads Birdy to investigate them with Tsutomu. The culprit is revealed to be a rogue combat marionette, which is killing the victims as it thinks of them as the mother, the main programmer when the marionette was placed under her care. Birdy attempts to retrieve it, but is attacked by supposedly a Federation-based person with a guardian robot that attacks her to keep her away from acquiring the disabled robot.

It has been confirmed: Nakasugi is the host for Ryunka. But Tsutomu wants to protect her, no matter what and so he takes control of Birdy's body when she tried to get close to Ryunka. Nejula knocks them out before their minds fuse completely. When they wake up again, Tsutomu has his own body back and needs glasses again. From now on, Birdy and Tsutomu go separate ways. When Birdy and Nejula arrive at Nakasugi's villa, she is already gone because she went to Tsutomo's place. To protect her from being pursued by her greedy relatives, Tsutomu leaves her in Shymalan's care. After that he discovers Shymalan's true intentions when Nejula confronts him...

Senkawa and the journalism club go investigate a refugee camp. While Hayasumi is just trying to get a good story, Birdy is hoping to get a lead on another alien living in the camp. Two young children, Takumi and Marina, give the club a tour of the camp. They run away into the ruins so that they don't have to be separated, but get attacked by a group of thugs. Nataru, volunteering at the camp, goes after the children, but isn't strong enough on his own. Birdy arrives to rescue him.

Iruma, Birdy's contact on Earth for information, is kidnapped by the escapees to lure her into a trap. She escapes being nearly killed by a long-range gun and fights to a draw. She collapses before she enters the portal to her ship, however. Tsutomu has a weird dream, a blend between his own memories and Birdy's. This is when he discovers he is trapped in Birdy's body. He is thus forced to follow her schedule, including a signing some of his classmates attend, a photo shoot and a reality contest where he has to eat bugs. At the end, he learns that personality merging has begun.

Shouko catches Nataru and Birdy in an embrace, although only because of Birdy's clumsiness. As a result, she runs off out of the hospital, calling Nataru to come find her. But when she sees Birdy with him, she keeps running off. At the end of the episode, Nataru is shot.