While you were playing your violin on your balcony you heard your neighbour, Welt, playing on his piano in his room, which had a balcony and he lives beside you so the sound of the piano was really clear.

He was playing Für Elise, so you decided to also play it on your violin. As you two finished playing he then went to his balcony and asked:

"Hi! Would you like to play songs with me sometime?"