[Dispatch=Reporter Lee A-jin] Singer Mark is making his first musical comeback as a solo artist.

According to Upper Room, Mark will release his new song "My Friend" on the 10th. The official YouTube channel also unveiled a music video teaser that day.

The teaser video begins with Mark gazing at the city beyond a large window. Against a backdrop of sunlight and grassland, it expressed a "back to basic" mood focused on genuine emotion.

The atmosphere shifts in the latter half. Mark ran freely across the blue grassland. He then left a striking impression as a silhouette standing before intense flames.

Mark is building anticipation for his comeback through various content. On the 28th of last month, he opened "Mark's Voicemail," where fans could leave voice messages themselves.

The response was enthusiastic. A total of 21,862 calls came in within just one hour. In the beginning, the number of concurrent callers exceeded the limit, making connections difficult as calls concentrated on the line.

Meanwhile, Mark will release his new song on various music sites at 1 p.m. on the 10th.

<Photo provided by Upper Room>