"FOMO" by ELHAE is about the artist's change in perspective and mindset regarding a relationship. "FOMO" stands for "fear of missing out," which represents how ELHAE used to feel anxious and uncertain about the connection and love he shared with his partner. In the song, ELHAE expresses his admiration for his partner, stating that they are his favorite. He asks them to do him a favor and describes how he can upgrade them from their previous negative experiences. Despite thinking differently about the relationship, he still has a fear of missing out on something better. His partner teaches him a valuable lesson that there is no such thing as perfection in love and that their love is more like protection. This realization serves as a blessing for ELHAE as he recognizes the importance of their connection. The lyrics also touch upon how ELHAE is willing to make himself available and prioritize his partner. He reassures them that he will be there when they call, expressing his commitment and willingness to make time for them. Overall, the song portrays a shift in mindset from uncertainty and anxiety to a deeper understanding and appreciation for the imperfect but genuine connection between two individuals.