I Sell Fate Through A System

In a remote alleyway stands a store. No one truly understands what it is selling, but people traverse it anyway.I hear the place fulfills your wildest dreams, says a female who wants to remain unnamed. People who enter never wish to leave.The store-owner is a jerk—the prices are expensive, the staff is rude and you serve yourself, another male explains, what, I'm still going though.I'm just here to look at the cute girls, says—well, his opinion doesn't matter, anyway.Listen, whatever you do, don't mess with the immortal siblings there. Who that is? The store-owner and his sister, of course! Why we call them that? The person shudders. Because we couldn't think of a fiercer name yet.Within the store, an inconspicuous youth sits at the counter. In his head rings a cold voice, Quest completed, ask Host to prepare for the next one.Eh, but I don't wanna.Quest issued, asking Host to check.Meh, I don't like it, give me something else.Non-compliance will lead to death.Sure, I'd love to see you try