First off, what's her face looks like she is only a manager position. She is not the owner. So does she make that much money to toss around like that? Dang that's one expensive hobby she got. Secondly, should she be discussing that kind of business at the office? What if the big boss decided to waltz in one fine day and overhear a secret trade like that? Someone's getting fired. Well, its not really a trade. They are "discussing" a one-sided conditions afterall.
Wait. Wait. Could the big boss be the person in chapter 1 with the flat butt?
Isn't she the "big boss"? And i don't think that It could be in the 1 chapter...
But you're right, thus all is beyond unrealistic but hell, this is a manga xD
And people got expensive Hobbys, some people just SHOWER in money for fun.
Or crash cars like my uncle because fuck the police comin' straight from the underground
He's rich as a bitch too, so i kinda understand this -__-" sadly