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.
Don't drag us down, Mr. Bottom 
of the Aristocratic Food Chain.
لا تعرقلنا يا سيّد مرتبة أدنى في سلسلة الطعام الأرستقراطي
No nos estorbes,
escoria de la aristocracia.
No nos estorbes,
escoria de la aristocracia.
Vedi di non trascinarci a fondo, Signor 
Gradino Più Basso della Scala Aristocratica.
Não nos seja um estorvo,
senhor ralé da nobreza.
Не будь обузой, 
дно общества аристократов.