"Siempre Tú" was composed by Muñiz in Los Angeles along with its producers Nico Stadi and Mike Green.

[1] The accompanying cover artwork shows Muñiz sitting on a chair looking off in the far distance against a backdrop of a street with tall buildings.

Jonathan Currinn from CelebMix described the song as "full of summer sunshine" and praised Stan and Muñiz's voices for "effortlessly compliment[ing] one another", and the use of the Spanish language.

[3] It was directed by Manuel Escalante of Enjambre Producciones[6] in different locations in Mexico City and Barcelona, with production and photography handled by him along with Petter Lettocha and José Casillas.

Everything begins [...] when I invariably connect with my partner (Alexandra Stan) through a virtual reality system in which we live a super romance and where we see each other in different locations in Mexico City and Barcelona.

[14] The clip received positive response, with Raluca Tanasă from InfoMusic writing that it "showcases the manifestation of love in a virtual way".

[6] Currinn of CelebMix stated, "On first watch, the viewers are captured by the beauty of the artists; so much so, that you don’t even realise that they're in different cities during the virtual reality scenes.