Dungeon Odyssey

Dungeon Odyssey summary:

The descendents of those who grew up sucking the nipples of monsters. Having special abilities and strong body: when they came back humanity called them dungeon babies. Then there is Kim jinwoo who was born in deepest of dugeons.
“I never tried to become strong, I just wanted to live.”
From the lowest treasure thief to the king of the dugeon, this is where his story spread.