Can the sands of time heal all wounds?; Can the sands of time bury the pain of the past?

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?

Ann and Daigo's long-distance relationship is put to the test as time goes by, and they find themselves spending more and more time with their childhood friends--aristocratic brother and sister Fuji and Shika--than each other. Is it just due to proximity or are deeper feelings at play...?