In a world where advanced androids called Giftias have a limited lifespan, Tsukasa Mizugaki, an 18-year-old who failed his college entrance exams, secures a position at SAI Corp, the company behind these lifelike creations. Assigned to Terminal Service One, tasked with retrieving Giftias at the end of their short lives, Tsukasa partners with the skilled and serene Isla, a veteran in the emotionally challenging duty of retrieving these androids. As Tsukasa navigates his new role, he grapples with his growing affection for Isla, knowing that their time together is fleeting and that all things, no matter how cherished, eventually come to an end.