Boku no Imōto wa "Ōsaka Okan"

(My Little Sister's an "Osaka Momma"), is a 2012-2013 Japanese anime television series. Considered to be a "Short" style Anime series, due its episode lengths being only 3 minutes long.

Plot
Kyousuke's younger sister Namika has been living apart from him for ten years. One day, she returns and begins to live with him again, but she has turned into an energetic tsundere Osaka girl.