Mari's quiet everyday life falls apart when she meets a mysterious boy. Her uncle returns after a long absence and tells her that earth is under alien control and that Mari is half human and half alien, while the strange boy confesses that he is trying to escape because he has stolen the key to liberate human beings from Mari's alien uncle. Mari, who only half believes their stories, meets her sister though she is not supposed to have one. Where is Mari heading for in her upside-down life?

Set in Nasu, Tochigi Prefecture in 1954, movie tells the tale of 14 year old boys: their friendships, fights among friends, and rebellions against the school. It also tells the story of the adults who live around the boys. This is a nostalgic, bitter, and sentimental journey into lives in the post-war environment.

A young girl named Ann moves with her mother to her mother's hometown after her parents go through a divorce. There, Ann meets her first love Daigo Kitamura. Daigo helps her get used to life in the country. Ann even gets through her mother's suicide.