The magician of the forest invites Chise into his library. Chise is reluctant at first, but they develop a strong friendship that would have a lasting influence on her.
That's probably the condition for 
their returning to their own world.
.هذا الشرط ليعودوا إلى عالمهم
Vermutlich ist das die Bedingung
für die Rückkehr in ihre eigentliche Welt.
Probablemente esa es la condición
para poder volver.
Probablemente esa es la condición
para volver a su mundo.
Je pense que c’est une condition
pour regagner ce monde.
Probabilmente è una condizione necessaria
per tornare nel proprio mondo.
Essa deve ser a condição para 
voltar ao seu mundo verdadeiro.