This song is a new opening song of Tuesday "Museca Style"(FM Ginga 78.6MHz). Maruno's "Best Smile" is decided on the opening song of the radio show(Museca♪Style) from April, 2013. He pays tribute to the program, and was newly written a song for the program. And "Happy Smile Happy Tuesday" was completed. This song has an uplifting sound and light and airy melodies worthy of the morning show.