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.
You're in high school, now. 
Shouldn't you be better than this?
أنتم في الثانويّة الآن، ألا يجدر بكم التصرّف أفضل؟
Muss das in der Oberschule noch sein?
Ya están en preparatoria.
Ya estáis en el instituto.
Vous n’avez pas honte,
à votre âge ?
Siete alle superiori e fate ancora queste cose...
Estão na escola secundária. 
Não deveriam se comportar melhor?
Разве в старшей школе так поступают?