The song "Ni tu ni yo" by Banda Santa Martha is about a forbidden love between two people who didn't choose to fall for each other, but can't deny their strong feelings. Despite facing obstacles and restrictions, they feel like teenagers in love, sneaking around and creating their own world together. They are willing to take risks and ignore any rules to be with each other, experiencing the excitement and butterflies of a new relationship. The lyrics convey a sense of rebelliousness and passion, as the couple navigates the complexities of their situation and cherishes every moment they have together.