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.
I was sure there'd be plenty of rare 
monsters in a hidden dungeon.
كنتُ متأكّداً أنّه سيكون هناك الكثير من الوحوش
النّادرة في ديماس خفيّ
In versteckten Dungeons sollte es
auch viele seltene Monster geben!
Supuse que habría monstruos
raros en la mazmorra oculta.
Supuse que habría monstruos raros
en la mazmorra oculta.
Il y a beaucoup de monstres rares,
dans le donjon caché.
Ero certo di trovare tantissimi mostri rari 
nel dungeon nascosto.
Achei que haveria monstros raros
numa masmorra oculta.
Я знал, что в скрытом подземелье 
полно редких монстров.