These are the tales of a certain couple who climbed a mountain... a college student who moved into a certain apartment building... and  a certain pair of siblings...
Must've been your imagination.
.لا بدّ أنّ ذلك خيّل لك
Wahrscheinlich Einbildung.
¿Te los imaginaste?
¿Te lo habrás imaginado?
Tu as dû rêver.
Talvez seja sua imaginação?