This will play during the intro for the third season, which (roughly/badly) translated, means "The Infinite Sunset" in Spanish. Any Spanish speakers can correct me on this, if I got it wrong. x3
The intro will (hopefully) be animated, and show various bits of the story of the third season. As the third season takes place on the frontier in northern Kerlynzia, Pratz, and New Tykondrus, there are some very western motifs to this theme! There are also some homages to two great series, the Chrono series, and the Wild ARMs series in this song. Enjoy! :3
Link
Tiido
Very awesome !