The First Partner.On the first day of his new job, Tsukasa Mizugaki rushes to Terminal Service No. 1, which is one of the offices in SAI Corp, where he is taught about Giftia, androids who survive on synthetic souls for a maximum lifespan of nine years and four months. Tsukasa is partnered with Isla, a Giftia who is highly regarded in the office and famous for a wide knowledge of herbs and tea. The two are led out by Tsukasa's trainer Michiru Kinushima and her partner Zack; Zack retrieves a Giftia, as a demonstration of their job for Tsukasa, and Michiru explains their job to him. Not long after, Tsukasa and Isla are assigned a mission to retrieve Nina, a child-type Giftia owned by an old woman named Chizu Shirohana. After multiple tries, Isla is unable to persuade Chizu to talk to them, which makes Tsukasa doubt her abilities. She finally manages to win a chance to talk with Nina, and Chizu overhears Nina giving her consent to be taken away so as not to cause trouble for Chizu, whom she loves dearly. Chizu, realising she had not considered Nina's feelings in the matter, finally allows Nina to be taken away, and thanks Tsukasa when he apologizes.