Guest appearances in the album include Bad Bunny, Pharrell Williams, Alexis & Fido, Feid, Romeo Santos, Laura Pausini and Latin Mafia, among others.

[3] On March 7, 2024, he revealed information about his fifth studio album during a video call with CR Fashion Book, where he stated that he would start a new era in his career.

[10] Because he does not like "repeating projects", he visualized the album's direction plans for a long period of time, stating to Billboard, "I sit at home, read a book, smoke a joint with some coffee, look at the sky, and map out what’s coming.

[13] A collaboration with fellow Puerto Rican rapper Bad Bunny, "Qué Pasaría..." is a reggaeton song which features lyrics that mainly focus on two people reflecting on their relationship.

[17][18] The fourth track from Cosa Nuestra, "Tú con Él" is a salsa cover of Frankie Ruiz's song of the same name.

[19] Alejandro also sings in English on the album's fifth track, "Committed", a collaboration with American musician Pharrell Williams which also contains Spanish-language lyrics.

[21] On November 19, 2024, Alejandro performed "Qué Pasaría..." and "Amar de Nuevo" on The Tonight Show Starring Jimmy Fallon.

Its accompanying music video, which was directed by Martin Seipel and produced by Rocío Taboada, features Alejandro dancing in the streets of New York City.

[32] "Déjame Entrar" was released on July 18, 2024, as the second single from the album, along with its music video, which features a cameo appearance from American actor Adrien Brody.

[46] In a rave review, Diego Ortiz and Pablo Monroy from Rolling Stone en Español were impressed by Alejandro's versatility, stating that, "The Puerto Rican reaches his creative peak with elegance and precision, positioning himself as an artist who transcends genres and who has the technical, artistic and cultural capabilities to exploit wherever he puts himself".