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...
Huh? Onii-chan?
ماذا؟ أخي؟
Huch? Bruder?
¿Eh? ¿Hermano?
¿Eh? ¿Hermano?
Hein ?
Hã? Mano?