a escondidas is a Spanish phrase that means "in secret" or "secretly". It's used to describe actions done covertly, away from prying eyes.
In the song, Junior H sings about a clandestine romance, referencing secret meetups ("esto es a escondidas") and forbidden photos ("Las fotos están prohibidas"). This evocative phrase paints a picture of a passionate, hidden affair, making you want to uncover the story behind the lyrics.
This song is all about a secret, intense, and maybe a little dangerous romance. Junior H describes a perfect night filled with specific details: the ocean, mezcal, a band playing outside, and of course, "La luz de la luna y las velas" (The moonlight and the candles). He's completely hooked on this person after just a five-minute conversation, calling her his "droga letal" (lethal drug). It's a powerful and blunt way to say this connection is addictive.
He paints himself as a "rockstar," not a liar ("Yo no soy ningún Pinocho"), living a fast life in his Audi R8. The relationship is hidden, just like Gina and Manny from the movie Scarface, and "Las fotos están prohibidas" (Photos are forbidden). It's a temporary thing—"Aunque es a veces nomás" (Although it's only sometimes)—but when they're together, it's all about luxury, passion, and living in the moment. He wants to repeat the whole night, from the wild party to their private time together.