Nile has it completely right.
Also, while the training is possible, I didn't think that would need to be the primary reason why she's there. At least, not for the standard reason. Sure, it'll probably take place for those clients that actually like women who aren't absurdly curvy and statuesque, but more important is to make her loyal to the Morimoto group.
As the only heir to her father's company, should anything 'unfortunate' happen to him, she gains control of everything. If she'd been properly trained, they wouldn't need to prop up the company with money anymore. They could just make her sign everything over to them. Not only that but she IS a smarty-pants, at least when it comes to science. I'm sure the Morimoto Group is always looking for easily manipulated people to make them more buckets of money for one of their companies.
Really, the way I saw it was that any training was less to sell her out to clients (Though i'm sure SOME people looking at the list of girls would be interested just for variety), and more to make her more pliable/submissive towards the Morimotos.
I'm open to suggestions for plot and whatnot though.
And if my choice in art style isn't wanted, then I'll back out. I didn't want to play as one of Yoshiten/Sei Shoujo's types of women for this, to add some variety. :x