UNIQ's song "Best Friend" is a heartfelt tribute to friendship, highlighting the deep bond between the members of the group. The lyrics express gratitude for the unwavering support and companionship of a best friend through both the good times and the hard times. The song reflects on precious memories and the comfort found in having someone always by your side. The members reminisce about their shared experiences and the joy they find in each other's presence. The song emphasizes the importance of staying true to oneself and maintaining a playful and supportive dynamic within the friendship. Overall, "Best Friend" celebrates the enduring and irreplaceable connection between the members, and their commitment to always being there for each other.