The stereotype of asians being super smart is heavily exaggerated, with Kim being an example of that being the case. Her grades are all Ds and below thanks to a lack of studying and going out with friends too often. Thankfully, shes not completely stupid. She knows that all she has to do is suck on her teacher's big white cock, and thoses Ds magically turn into Bs. Not high enough to meet her parents expecations, but enough to pass her classes.