Girl group Billlie has pre-released the MV for "Trampoline" from their upcoming 5th mini album, 'appendix: Of All We Have Lost'. 

Described as a Nu jazz genre with a groovy bass line, "Trampoline" fuses jazz elements such as scatting with a contemporary hip-hop style. The lyrics feature happy memories from one's childhood jumping on a trampoline, and how those happy memories can help listeners endure difficult times in the present. 

Meanwhile, Billlie will be making their comeback with 'appendix: Of All We Have Lost' on October 16 at 6 PM KST. The girl group's title track is "Memory Candy", with lyrics co-written by IU. 

SEE ALSO: Billlie brings out the first track drop teaser for "trampoline"