Aoki tells Yushi that he must be suffering without his parents, even though he isn't.  She has good intentions, but Yushi is frustrated by her inability to see who he really is, and insistance that he has to be what she thinks he is.
Bye. Good luck with your studies.
إلى اللقاء. حظّاً موفقاً في دراستك
Also dann, streng dich an.
Suerte con sus estudios.
Suerte con vuestros estudios.
Bon courage pour l’anglais !
Studiate diligentemente, d'accordo?
Era isto. Boa sorte nos estudos.
Ладно, учись усердно.