Boku no Imouto wa "Osaka Okan": Uchi no Onii-chan wa Tokyo Rule

An online-broadcast-only episode of Boku no Imouto wa "Osaka Okan".

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 Osaka girl.

Preview episode aired online.

Two-part special anime included in Osomatsu-san 3rd Season Blu-ray and DVD volumes 7 and 8.