At the beginning of "Bouquet of Love", Mai and Juan invariably discuss that they cannot share a pair of headphones to listen to music.
There is a common memory of two people, they once used a pair of headphones to listen to music, was educated by musicians, the L and R sound effects of headphones are not the same, can not be heard separately.
This little knowledge is also the screenwriter's view of love, even if it is a close couple, they can not be obsessed with sharing, and do not know how to leave an independent space for themselves.
A good relationship should be a beautiful thing to share, but you can't lose the independent space that the individual should have for the sake of the relationship.
And music is a symbol of the space that individuals should enjoy exclusively.
