Kyousuke Ishihara is an ordinary high school student in Tokyo who has spent ten years living apart from his younger sister, Namika. When she comes back to live with him, he finds she has grown into a lively Osaka girl after her decade in that city. Kyousuke struggles to make sense of her odd behavior and her Osaka dialect, and the two gradually grow closer through their differences and the challenges that change brings. The result is a short-format comedy built around a brother and sister getting to know each other again.