SM Entertainment announces 'Winter Garden' as this year's winter project single.

On December 4th, SM Entertainment releases a teaser image of a flower plant with three different dates "15", "18" and "22" along with the title 'Winter Garden'.

It's no doubt that SM artists will participate in this project, but they have yet to reveal who will join in. 'Winter Garden' is said to be following TaeTiSeo's 'Dear Santa' and EXO's 'Sing For You'.

Who do you think will take part in this special project?