On November 18 KST, the group's agency Fantagio Music released a music video teaser for their upcoming single "Blue Flame." In the clip, each member is seen in their own settings, each tinted in blue but ranging in concept. During a portion of the clip, right when the song's sample drops, fans are given a preview of the hook choreography, with each member transforming from an all-black look to coordinated black-and-white outfits.

Meanwhile, ASTRO's sixth mini album 'Blue Flame' is set for release on November 20 KST.