Released on Tuesday, the track opens with airy strings and Soyou’s breathy voice before morphing into a rhythmic pop song that incorporates tropical house synths and R&B melodies as Key professes his dedication. Known by his stage name but born Kim Kibum, Key will reportedly follow up “Forever Yours” with his first solo album later this month.
The song was released through a throwback music video that sees Key as a car mechanic who takes an interstellar trip in his suped-up, flying Mustang. With colorful, retro-feeling graphics and word art flashing across the galactic scenes, the clip ends with Key landing in a desert and looking around. While she can be heard, Soyou -- who has previously spoken about her close friendship with Key -- does not make an appearance in the video.