[4] It is the first Exo record to not feature Tao, as he filed a lawsuit against SM Entertainment and left the group in August 2015.

On 10 December 2015, shortly after Sing for You was released, Exo held a showcase with an audience of 1,500 to promote the album at Lotte World in Seoul.

[7] Exo began performing the songs "Sing for You" and "Unfair" on Korean music shows from 12 and 18 December respectively.

[8][9] They also added these songs to the setlist of their second solo concert tour The Exo'luxion starting from the Singapore show on 9 January 2016.

On 4 November 2015, Exo was announced to be releasing "Lightsaber", a promotional song for the movie Star Wars: The Force Awakens in South Korea, as part of the collaboration project between SM Entertainment and Walt Disney.