Hayate starts his new job at the cafe Shun's sister Asami runs. But then Asami asks him to help Shun with his studying, seeing that her brother is not making any progress on his own...
So there probably isn't 
anything I don't understand.
لذا غالباً ليس هناك أيّ شيء لستُ أفهمه
Also gibt’s wohl nichts,
was ich nicht verstehe.
así que probablemente entienda todo.
así que parece que no entiendo nada.
Si ça se trouve, je comprends tout.
quindi forse non c'è niente
che non ho capito.
Então não deve ter nada que eu entenda.
Так что, наверное, знаю всё.