18 volt sings a song for 9 volt

Transcript
(starts at the beach, 9 volt is sad, but 18 volt comes)

18 volt: oh 9 volt

9 volt: huh?

18 volt: (Sings) I found a heart-shaped treasure map inside a bottle washed ashore.

And when I followed the dotted line, it led me to you forevermore.

9 volt: (looks sad)