PROLOGUE

Sulli at math. She entered highschool without a knowledge in algebra/geometry/calculus/ and whatnot. Why and how did she pass elementary? Simple. They’re rich so her father had just paid for it. It’s the reality. No matter how hard she tried, she never ever got a perfect score in their math examinations – no, ¼ correct answers would be high enough for her.

Sulli met Krystal. Krystal Jung is the smartest in their class. Well, Sulli, too would be totally perfect, if only she knew the world of math. She’s good in English, in Korean, in Chinese mandarin, in Japanese, world history, Korean History, Science (except the part of computation), in arts, music and all – except one thing – MATH.

She is very competitive. She doesn’t want someone to go beyond what she has, again, except the fact that someone is better than her in Math, and that is Taemin, her best friend slash childhood friend. As long as it is Taemin, she can still tolerate it, but if someone does… she will definitely find a way…