I don't have enough information to determine the key elements. It could be things like mutual passion for music if their partner is also involved in the music industry.
The key elements of the DJ Big Deal Love Story could be quite diverse. It might start with a chance encounter at a music event. Then, shared interests like a love for a particular genre of music could be important. Their relationship might also have to deal with the challenges of fame and public attention that comes with being a DJ, which could be a major part of their love story.
Since we don't know the details, the key elements might be related to the DJ's lifestyle. Maybe the story involves how they balance their love life with their busy schedule as a DJ. Another element could be the influence of their fans or the music community on their relationship.