Twelve-year-old Ann and her divorced mother move from big city Tokyo to her mother's rural hometown. As the years pass, Ann learns to trust and depend on her new friends--Daigo and aristocratic siblings Fuji and Shika. But when Ann moves back to Tokyo to be with her father, will she be able to maintain a long-distance relationship with Daigo?
Daigo digs up the time capsule he buried twenty years ago when he was only ten. What message did Daigo leave for his future self? And what does it take to live life fully and without regret?