"21C / Delta" is a song by American rapper Jack Harlow, which talks about his desire to find love and a meaningful connection with someone. The song begins with him mentioning the legal process of signing paperwork to solidify a relationship, but also manages to capture the emotional depth of his feelings towards the person he's interested in. The chorus of the song is an expression of Jack's admiration for this girl who is ambitious and determined to succeed, but also in need of love and affection. He invites her to put her trust in him and open up to him emotionally by telling her that he needs someone just as much as she does. The title of the song references the hotel chain "21C Museum Hotels" where Jack is staying, and also includes the airplane model "Delta" which he flies in to get to his destination. The references suggest that he is on the move and constantly searching for new experiences and connections. Overall, "21C / Delta" is a heartfelt and introspective track that explores the themes of love, vulnerability, and self-discovery in the context of Jack Harlow's personal experiences.