Idol group 2AM's member Changmin revealed a 'retro' style.

Today, Changmin posted on his Twitter, "'Friends' musical, retro style run-through today," along with a picture.

In the picture, Changmin is wearing a red-checkered shirt and is posing for the camera.

Internet users who saw this commented, "Retro style looks good on him too," "You look good without your glasses too," etc.

Changmin is currently playing the role of Junsuk in the musical 'Friends.'

Photo Credit: Changmin Twitter