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.
That's how it works in the adult world.
هكذا عالم البالغين
So funktioniert
unsere Gesellschaft.
Así funciona el mundo adulto.
Así funciona el mundo adulto.
Assim que funciona no mundo adulto.
Так устроен взрослый мир.