@U235 His reaction is fine. He only said he's never carried 15k around, and neither have I. It'd be in the bank, not in wallets. Surprise is also normal, since average salarymen wouldn't have made 15k in a single day.
I revisited this manga even though I dropped it before. Pretty sure my standards have dropped, but eh, there are a hell of a lot worse titles out there. This one's at least readable.