"Rosa" by 13ème Art talks about a night out with friends, where the artists reflect on their experiences and interactions with women. The lyrics describe a night filled with alcohol, partying, and encounters with different women, referred to as "Rosa" in the song. The song portrays a carefree and fun atmosphere, with references to being drunk, driving around in a Testarossa, and being surrounded by attractive women. The artists also touch on themes of loyalty, betrayal, and deception in relationships, as well as the pressure to maintain a certain image in the music industry. Overall, "Rosa" captures the energy and excitement of a night out with friends, with a mix of playful banter, flirtation, and introspection. The artists depict a world where appearances can be deceiving, and where relationships are complex and sometimes fleeting.