On their first day of high school, shy Ayumi Nonomura and taciturn Tatsuki Iizuka become lost on the sprawling campus of Kamizono Academy. They are suddenly confronted by the effervescent Torako Kageyama and her best friend Suzume Saotome. Guided, sometimes pushed, by Torako, Ayumi, Tatsuki, and their classmates navigate the challenges of school, family, and growing up.