Red Velvet's Joy and musician Wonstein will be testing out their chemistry with a duet single.

The two singers will be working together for the music release series 'World Peace Project', where part of the proceeds earned through music streams will be donated to underprivileged communities. Previously, singer Jung Dong Won and fromis_9 member Park Ji Won participated in the first 'World Peace Project' single, "Love Actually", successfully topping various music charts. 

The second 'World Peace Project' single, sung by Joy and Wonstein, is described as a moody hip-hop R&B genre, dealing with a sweet and pure love. 

The single will be released on October 21.