On November 24, 2015, Exo confirmed the upcoming release of the second special winter album after "Miracles in December" (2013). Teaser images for the album began released on December 2. The list of songs from the album, including four new songs and a bonus track "Lightsaber " previously released in November, was announced on December 7. Music videos and the teaser of the song from the album "Sing for You" were released on 8 and 9 December respectively.