2AM made promises to fans that will be fulfilled if it snows falls on the day of their upcoming concert!

SEE ALSO: 2AM's Seulong takes a solo stroll in the winter sea for new teaser images

Changmin promised, "I will invite one person to the dressing room and take photos together." Jo Kwon wrote, "I will hand out a sign CD of our mini album, 'NOCTURNE'." Jinwoon shared, "I will unveil my abs during the concert", and Seulong said, "I will take a photo with an audience members and share the proof shoot on my Twitter."

If snow falls that day, the lucky fans who will help 2AM fulfill their promises will be chosen by random selection according to their seat number. 

These ballad idols will hold their '2013 2AM CONCERT-NOCTURNE' at SK Olympic Handball Gymnasium on December 7-8, so let's hope that snow will fall on those days!