Weki Meki released the music video for the title track of their 4th mini-album on October 8th. Five days later, "COOL" has become their fastest music video ever to reach 10 million views on Youtube and their fourth MV overall to reach this milestone. 

In comparison, the music video that previously had the fastest way to 10 million views was "Crush," released in 2018, that took 322 days to reach it, meaning "COOL" represents a significant leap.

Their third comeback this year, "COOL," is intended to honor the "performance queens" title held by Weki Meki and brings a new concept.