野良犬疾走日和 (Norainu Shissou Biyori)

野良犬疾走日和 (Norainu Sissou Biyori / Fair Weather for the Stray dog to Run) is a folk song composed by BosuHasirazuIsoideAruitekiteBokurawoTaskete-P, illustration by una from Piapro, and sung by Meiko and Kaito. It's one of their most notable duets, achieving over 300,000 views; with various fanmade PVs / interpretations taken.
 * Nicovideo broadcast
 * Youtube broadcast (with subtitles)

Background
The song was first uploaded on August 19th 2008, and is BosuHasirazuIsoideAruitekiteBokurawoTaskete-P's biggest hits; in fact, his most notable. Achieving over 200,000 views; it was his first work to have reach Nico Hall of Fame (exceeding 100,000 views).

The song has no fixed meaning; why Kaito is in a clown suit while Meiko in a kimono is unknown either. The main point of the song is to "run". It/someone told them to just run; accompanying the dog. As the title says, a fair weather for the stray dog to run.