Music like 2018 playlist

Mono (stylized as mono.) is the second mixtape by South Korean rapper RM. It was released on October 23, 2018, through Big Hit Entertainment. It features seven tracks and was accompanied by an animated music video for the final track, "Forever Rain". RM has called Mono a playlist, while other publications have referred to it as a mixtape. It features songs sung and rapped in both Korean and English.

RM first teased the mixtape and confirmed its production in March 2018 by posting a clip of an unnamed song through BTS' Twitter account. In June 2018, British electropop duo Honne said in an interview that they had possibly worked on music with RM. They initially gained an interest in collaborating with RM after discovering he was a fan of their music online, and meeting him in Seoul after performing there.