Fronted by the smooth R&B-tinged dance track “Jealousy,” The Connect is the band’s first album of 2018 and their sixth EP overall. It features seven tracks, including "If Only," co-written by Wonho, and "Special," co-written by Jooheon. Jooheon and I.M also contributed by writing the lyrics to their raps on all the tracks.
Beginning with a snapping-and-synth beat and propelling the song with repeated hook phrases, “Jealousy” blends Monsta X’s hip-hop leanings with retro-inspired melodies, sounding like something straight out of the heyday of boy bands in the late '90s and early '00s. Sleek vocals, particularly Kihyun's, drive the majority of the song, making it one of Monsta X’s poppiest singles to date. But for fans of the act's more typically boisterous sound, rappers I.M and Jooheon get their chance to shine during an aggressive, trap-laden breakdown.