Puchimas!: Petit iDOLM@STER Episode 56: Vacation!?
Episode 56 of 64 of Puchimas!: Petit iDOLM@STER, aired March 18, 2013, 2 minutes. Available with English subtitles and dub where released.
Episode summary
Ritsuko finally returns from her worldwide Haruka-san hunt. Source: crunchyroll