E'LAST's Romin and Wonjun have teamed up with a rather unexpected collaboration artist, actor Yoo Joon Sang!

Last year, the E'LAST members spent time with veteran actor and musical star Yoo Joon Sang by receiving tennis lessons from him in their YouTube original content. After forming a bond with the E'LAST members, Yoo Joon Sang has decided to work with the boys once again, this time for a collaboration single!

"Ay Mamita", sung by Romin, Wonjun, and Yoo Joon Sang, is a warm, spring ballad with lyrics depicting the confession of a young man who was unable to deliver his sincere feelings of love. The lighthearted melody, accompanied by the acoustic guitar, perfects a sweet spring tune anyone can sing along to. 

Check out the MV for "Ay Mamita", above!