NCT 127 have dropped the behind-the-scenes of their "Be There for Me" choreography practice.

In the inside look above, the NCT subunit members go over the choreography for their winter holiday track with a dancer standing in for Mark, who was having issues with his health late last year according to fans. "Be There For Me" is NCT 127's winter special single, and it's about wanting someone to be by your side.

Watch NCT 127's "Be There For Me" behind-the-scenes above, MV here, and make sure to turn on the English captions.