A world in which science is slightly more advanced.
18-year-old Tsukasa Mizugaki got a job at SAI, a major global corporation.
SAI manufactures and manages androids with human emotions, known as “Giftia”, and Tsukasa is assigned to a department called Terminal Service.
But it turns out that the department is for deadwood employees, where the main responsibility is to retrieve Giftias reaching their expiration dates.
Not only that, but Tsukasa is partnered with a female Giftia named Isla, who has never given any responsibility other than serving tea to her coworkers…

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