Wacha-Mocha-Pettan Koushinkyoku

is a song by Hello, Happy World!

It is the coupling track for their 3rd single, Kimi ga Inakucha!, which was released on December 5, 2018.

It is the gift song for the event Little Smiley Steps!. It is also the second Challenge Medley song for the event Let's Screeeeam!

It was written by Oda Asuka, and arranged and composed by Suemasu Ryota.

Video
Single Preview = The song starts from 01:43.

Live Performances

 * May 15-16, 2021: Welcome to OUR MUSIC♪
 * November 7, 2021: Kasumi and Tae's After-School Tour at Zepp Nagoya (Daytime Set)