If I had a nickel for every manga I read about an unassuming uncle being OP while being steamed by his niece in a dungeon, I’d have two nickels. Which isnt a lot but… well it’s not that surprising, this is kind of how the industry works
3 nickels in my ca—oh, wait, you said streamed by a niece. Yeah, two nickels. While she isn't actually his niece, it seems like her relationship to him while growing up is that of a niece, so I'll give it a pass.