향기로운 꽃을 찾는 내 나비가 되어줘요, 그대.
- 향기로운 = fragrant, of a pleasing scent. 향기로운 꽃 = a flower with a sweet scent.
- [향기로운 꽃을 찾는] 내 나비 = my butterfly [searching for a sweet smelling flower].
- X-가 되어줘요 = become X for me. (X-가 되어 = become X; V-어 줘요 = do V for me)
So it can be translated as : My dear, please be my butterfly looking for a sweet smelling flower.