Boku no Imouto wa "Osaka Okan"

Kyousuke Ishihara is an average high school student residing in Tokyo. Recently, his younger sister, Namika, has moved back home after living in Osaka for 10 years. As Kyousuke tries to understand his sister's peculiar behavior and dialect, the two bond over their differences and the difficulties that come with change. Kyousuke has been living apart from his younger sister Namika for ten years. One day, he begins to live with her, but she has turned into an energetic tsundere Osaka girl.