"Nada Serio" is a song by Jay Wheeler and Casper Mágico. The lyrics discuss a relationship that is not serious and the artists' reluctance to pursue a committed love. They express that they have changed and no longer believe in love as they once did. They mention that they enjoy being single and do not want to be tied down to anyone. Despite this, they also acknowledge that they have been hurt before and are guarded in their approach to love. The song also touches on the idea that sometimes people enter our lives unexpectedly, but that doesn't mean we have to fall in love with them. Overall, "Nada Serio" conveys a message of not wanting anything serious and enjoying a carefree and single lifestyle.