It was the end of her senior year of high school, and Lisa was annoyed by the last research paper of the year. Fortunately, she had a deal to have it taken care of by her business partner, Phil. Ever since their deal had started, he had done her history assignments in exchange for a supply of credit that translated into sexual favors. Lisa's roommate Kaori had the same kind of deal with him.
Lately, though, Phil had been getting a surprising amount of action on his own, which was initially not a factor in their deals, so Kaori and Lisa decided to talk to him as soon as they got this assignment. It was possible their business partner wouldn't feel he needed their services anymore, so he wouldn't want to write two extra papers when he could get laid for free.
"Hey Phil," Lisa greeted him casually as they approached him in one of his usual locations. "Got a minute for us?"
Phil took in the sight of his beautiful "clients" when he glanced up from his book. They had similar thin, toned physiques, but there were differences. Kaori was slightly darker, as she was Hawaiian while Lisa was Chinese. Lisa was about two inches taller, and it was all in her great legs. Kaori had a little more substance to her frame, with a noticeably larger rack and rounder ass, which made Phil think she was the prettier one, by a narrow margin. Lisa's eyes were a little deeper-set, and her cheekbones were a little higher, but overall, they were both similar visions proclaiming "sex" to an observer.
"Absolutely. I guess you want to talk about the research paper in history class." The girls acknowledged this. "Don't worry, I'll still do it." Relief washed over the girls' faces. "Actually, we should go to the library now; there won't be many people there at this hour."
"Why would we go to the library for you to do our research?"
"Well, sweetie, one of the easiest ways to catch onto people who aren't actually writing research papers is to check with the librarian to see if they've checked anything out recently. If I check out all the books, and you two check out nothing, our teacher isn't _that_ stupid; he'd catch on. So you two will come with me, even into the stacks." They assented once they understood.
The library wasn't that far away, and within ten minutes they were inside the stacks. Their boarding school shared a library with the surrounding town, so it was far larger than any ordinary high school library, with several floors of books. Phil quickly found what they needed and set it aside on a study table.
"Now, ladies, there is the matter of your accounts with me."
Lisa sidled up to him and put her hands on his chest. "Ooo, Phil, wanna fuck us in the stacks?"