Manga Special Training in the Secret Dungeon!

The third son of the noble beggar Nooru lost his job, which left him in complete confusion. While he was thinking about how to make money, and whether he should become an adventurer, fate made a choice for him. Suddenly, he finds himself in a legendary hidden dungeon, where no one can find the entrance. Here you will find the most intimate treasures, powerful magical beasts and magical tools for gaining power. If you do not talk about this place, then pretty soon I will become the strongest! So the guy thought, and tried to seize untold riches. But where will this path lead him?