Holy shit.
This MC is probably the worst guy ever.
"I have to save my sister, I need a special shop to find the ingredients."
"Oh, this shop sells what I want to level up, that a nice bonus. Let's not forget why I'm here in the first place tho."
"Some rich bitch wants ma stuff, but nope."
"I might get what I need to save my sister, but I'll need to shut up, swallow my pride and just buy the stuff from this underground shop and give the bitch what she want"
"... or I JUST DESTROY THE SHOP LIKE A PETULANT CHILD, fight the bitch, start a war against a literal mountain of monster and go on an adventure"
"Sister? what sister? who's that?"