NU'EST W was a subunit of the South Korean boy group NU'EST under Pledis Entertainment. The group consisted of the members JR, Aron, Baekho, and Ren, who were promoting without Minhyun, because of his promotions with Wanna One.

The group debuted with their single titled If You on July 25, 2017, which was followed by their EP W, Here with the lead single Where You At on October 10, 2017. They had their first music show win with Where You At on October 19, 2017, on M! Countdown.

On November 26, 2018, the group released their last EP as a unit Wake, N, withe the title song Help Me. The group disbanded on December 31, 2018, following Minhyun’s return from Wanna One.