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.
And boys his age have many worries 
and frustrations, I know.
والفتيان في عمره يعانون هموماً وإحباطاً كثيراً حتماً
Außerdem ist er
in diesem Alter …
Y los chicos de su edad tienen muchas
preocupaciones y frustraciones.
Y los chicos de su edad tienen muchas
preocupaciones y frustraciones.
Et puis, à son âge, on éprouve
un tas de doutes et de frustrations.
E poi i ragazzi della sua età
hanno un sacco di preoccupazioni e dubbi.
Sem contar que meninos da idade dele 
vivem frustrados e de cabeça cheia.
Я знаю, что у ребят его возраста 
немало тревог и проблем в жизни.