Mono.

Mono (stylized as mono.) is the second mixtape by South Korean rapper RM of BTS. 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.