Sixteen-year-old Kiku has never taken interest in anything. At least, not that she can remember. When World War III occurred, Kiku was wounded in events she herself can't remember. An amnesiac with a pessimistic view on her existence, she now shuts herself away in a bomb shelter, her only interactions being with her friends Crystal and Lee. Lee is sick and tired of watching Kiku waste her life away and plans a trip to show her the world. Join Kiku as she discovers the joys of living, strengthens bonds, and encounters pieces of her past on the journey of a lifetime.