Noir is the 3rd son of a poor noble and his job position is taken away by a more powerful noble. He also sadly lacks enough skills to attend the Hero Academy. He tries to find a way to be able to use his skill [Great Sage] better and stumbles across a hidden dungeon.
Well, that library you're 
supposed to work at...
...إذاً تلك المكتبة التي يُفترض أن تعمل فيها
La biblioteca en la que ibas a trabajar…
La biblioteca en la que ibas a trabajar…
Riguardo alla biblioteca
 presso la quale hai trovato lavoro...
É sobre a biblioteca em que
você ia trabalhar...
Библиотека, в которую я 
тебя вроде как устроил...