In a near-future futuristic metropolis, human-like androids known as Giftias coexist with society. Manufactured by the SAI Corporation, Giftias possess genuine emotions and memories, but they have a strict lifespan of precisely 81,920 hours, roughly nine years and four months. Exceeding this limit causes personality disintegration, memory loss, and violent, uncontrollable hostility known as "retrieval failure." To prevent this, the Terminal Service Department is tasked with confiscating Giftias before their
expiration date, operating under heartbreaking emotional burdens.Following a traumatic incident that ended his previous career, Tsukasa Mizugaki, a naive and empathetic nineteen-year-old, secures a job at Terminal Service One through his father's connections. He is partnered with Isla, a seasoned veteran Giftia who has been relegated to making tea in the office due to her approaching expiration date. Despite her pessimistic demeanor and extreme clumsiness, Tsukasa is immediately drawn to her and vows to remain by her side until the very end.As Tsukasa and Isla navigate their daily assignments, they confront the agonizing realities of human-Android attachment. They encounter grieving clients who struggle to surrender their beloved companions, ranging from elderly owners to adoptive parents. Through these poignant encounters, Tsukasa learns the delicate balance of compassion and professional detachment required for the job, while Isla slowly thaws, rediscovering her passion for life and love through Tsukasa’s unwavering devotion.Their partnership deepens into a romantic relationship, complicating the inevitable. Knowing that Isla has only months remaining, Tsukasa struggles to accept the ticking clock. Meanwhile, Isla fears the impending loss of her memories and the pain it will cause Tsukasa, briefly trying to push him away. However, they ultimately choose to spend their remaining time together authentically, defying the despair of their situation.The narrative reaches its emotional climax as Isla’s expiration date arrives. Showing immense maturity, Tsukasa prepares to fulfill his ultimate duty as a Terminal Service employee. In their final moments together, they share a tearful, bittersweet farewell at an
amusement park. Tsukasa successfully retrieves Isla, ensuring her memories are preserved with dignity rather than corrupted. Months later, although heartbroken, a more resilient Tsukasa continues working at Terminal Service One, welcoming a new partner and carrying Isla's enduring memory forward into his future.