Shinya lost his mother at a young age, and Shinya's classmate, Yuka, feels out of place in her own home. Perhaps grappling with their loneliness, the two form a close bond as they work on the school newspaper. But an unexpected incident leads to Yuka's sudden disappearance. Shinya, feeling lost and clinging to a promise, waits for Yuka's return. Thirty years later, the truth about Yuka's past finally comes to light.