On the December 7 airing of KBS2's 'Yoo Hee Yeol's Sketchbook,' MC Yoo Hee Yeol commented, "Nell is the musician of musicians. 'Successful fans' of Nell include Girls' Generation's Taeyeon, INFINITE's Sunggyu, and Coldplays' Chris Martin." To this, Nell said, "We've also recently worked with RM the leader of BTS."
Nell featured in the song "Pass By" for RM's 2nd solo mixtape 'mono.'
When asked how this collaboration came through, Nell explained, "RM has liked our music for a long time now. He said there's a song he worked on with us in mind. We listened to it and it was so great, and we could tell what kind of vibe he had for it so we got to work together."