This hetalia foto might contain
medias, leotardos, collants, bustier, bustier traducción, leotardo, maillot, juego del cuerpo, traje de gato, leotard, unitard, traje de cuerpo, mameluco, and juego del gato.
The song is "Age of Cathedrals" from the musical Notre-Dame de Paris in French, Italian, and Spanish. Since high-rising gótico cathedrals of the late 15th century exist in France, Italy, and Spain, I used these three languages.