Tsukasa Mizugaki, eighteen, has failed his college admission examinations, but after manipulating some connections, he lands a job at the Sion Artificial Intelligence Corporation. SAI Corp is responsible for the development of "Giftias," which are highly sophisticated androids that are nearly indistinguishable from normal people. Giftias, on the other hand, have a maximum lifespan of 81,920 hours, or almost nine years and four months. Tsukasa's station, Terminal Service One, is in charge of collecting Giftias that have reached their expiry date before they lose their memories and turn hostile.