“Roller Coaster” is the lead single from Chungha’s sophomore mini album, Offset. The song was released on January 17, 2018 for digital download and distributed by MNH Entertainment physically.

Lyrically, the song contrasts the emotions of a relationship that has its ups and downs to a roller coaster ride. The song peaked at #6 on the South Korean Gaon Chart, and has been certified platinum in South Korea.