It uses metaphors like "be my only one" to emphasize a unique relationship that brings happiness and fulfillment.
The song is a deep dive into the concept of unconditional devotion. only - leehi (sped up) my only love
The lyrics express a desire for a "forever love," where two people provide a "roof to rest on" for each other during busy or rainy days. It uses metaphors like "be my only one"