In the past decade, Ikuru Yoshizumi has been battling a fatal illness that has taken a toll on his time. Hoping to find solace and meaning in his final days, Ikuru makes the decision to adopt an AGH-RMS - a human genetically modified with a limited lifespan specifically created to offer companionship to those facing their mortality. His match is Ai, an AGH-RMS fashioned to resemble and behave like a girl of her age. As Ai absolutely adores Ikuru, her love helps develop her into an extraordinary person and provides Ikuru with a purpose to hold onto. Even amidst worldwide conflicts, Ai and Ikuru rely on each other for comfort, compassion, and motivation to fight on.
