1TEAM smashed everyone's expectations when the boy band dropped their comeback single 'Ullaeli Kkollaeli.'

On August 4, the boys of 1TEAM dropped their latest single '"Ullaeli Kkollaeli,' which features the group in different settings, having fun, and dancing to the beat of the song. One setting is when the group is trapped in a freezer locker and freezing until they come out and living a gangster fantasy.

1TEAM creates a fun and exciting atmosphere in both the song and the MV. In the music video, the group is wearing a variety of streetwear as they dance to different locations, running around a highway and showing their close bond.

In the past month, 1TEAM teased their comeback through numerous posts on their social media. The first teaser photo is a bright-colored poster containing the release date for 'Ullaeli Kkollaeli' and type of upcoming project, stating it will be a digital record.

The second post is a photo and the title of the song (Ullaeli Kkollaeli) with the words "Made by BC." 1TEAM member BC is known for writing for the group in a couple of past projects.

On July 17, 1TEAM revealed their comeback schedule, exciting their fans even more. Then on July 22 and 24, the group released two batches of concept photos, which the boyband transformed into attractive men, sporting in bright and lively clothes. The group also shared exclusive clips, focusing on behind the scenes of the photoshoots.

On July 30, 1TEAM revealed two MV teasers for 'Ullaeli Kkollaeli' where the group is looking like gangsters in a retro movie, wearing suits with gold necklaces and hairspray hairstyles. The second MV teaser went into a different approach that focuses more on the dance choreography with a brighter feel from the first MV teaser.

1TEAM's 'Ullaeli Kkollaeli' is a song about moving on with your life despite its setbacks.