Donna sat with her friend Buffy at a table in the empty library, the day was near its end and nobody was around, the sound of the wall clock's ticking resonated sharply since there was little else to drown it out, Buffy was chewing on the tip of her pencil as she tried to decipher the convoluted scripts that were the math homework sheets.
It was going very slowly.
Donna actually liked math, she found it coming naturally to her whenever she stared at the blackboard, the numbers and figures seemed to expand before her eyes into what she considered a second language, she knew that many of her classmates would kill for her gift, Buffy settled for just using it to study.
"I can't do this!" Buffy seemed to finally throw in the towel (or more accurately, the pencil) in a huff of irritation "I can't even concentrate, it's too quiet and that clock is too annoying!"
"Calm down, we can stay here until you get it." Donna calmly reassured her friend, the place was pretty empty, but she would rather not attract any unwanted attention to herself from anyone who might still be here, especially since she could probably be heard from across the library due to it being so quiet and spacious, their library was rather big, considering it was still a school library, but it was one of the town's biggest points of pride, it was actually the biggest library in the county.
"I have an idea," Buffy's face lit up as she narrowed her eyes and grinned a grin that gave Donna goosebumps; she knew where that grin usually led "Give me one of those mock exams you have."
Donna did so, all while Buffy seemed to be closely examining Donna, before Buffy picked up her pencil and set out to solve the problems in the exam, she explained her idea:
"I need some motivation, you see," Buffy began scribbling on the papers excitedly before looking back up to Donna "So here's the deal: You're wearing five pieces of clothes? For every twenty marks, you take off piece of clothing, how does that sound?"
Donna sat frozen for a second, not because she was shocked, no, she came to expect these kinds of things from Buffy, who always sought to strip her naked just for funsies.
No, Donna was actually considering her prospects, she didn't see anyone around, most students have gone home already so there was little chance of someone coming in, and she doubted there was anyone left in the library at this hour, though she couldn't be sure, finally she looked over to the librarian, who was an extremely old lady who seemed to be sleeping in her chair, Donna figured that she could motorboat the woman with her breasts and she still wouldn't notice the naked girl at this point.
That's when an idea hit Donna, an idea that would allow her to get revenge on her friend for all the countless times she stripped her and embarrassed her in front of so many people (although she can't deny she was implicit to most of those times):
"Fine, but if you score less than twenty on this exam, you have to strip," Donna enjoyed the look on Buffy's face as she presented her counter offer, it wasn't much, but it was fun seeing the shocked surprise on her face.
"Okay, deal!" Buffy exclaimed and set out to solving her sheet.