4minute's first unit 2Yoon revealed teaser music video of "24/7" featuring comedian Jung Hyung Don from their debut album Harvest Moon.

2Yoon consisting of Heo Gayoon and Jeon Jiyoon yesterday unveiled their first teaser video through Cube Entertainment's YouTube channel.

The short teaser features Jung Hyung Don making a comedic appearance as he dons a cowboy suit. Fans might be disappointed for the lack of appearance by 2Yoon however the video does provide short audio preview of the country pop/dance track.

 2Yoon will release their debut album Harvest Moon on January 17.