Kyuhyun is a rebel and a genius in math. Sungmin is a new math teacher in Kyuhyun's school. What if Kyuhyun falls in love with Sungmin when she first time introduces herself? What will happen when Kyuhyun knows the real facts about Sungmin? 

a/n: another oneshot of KyuMin from me. it's genderswitch. don't read it if you hate genderswitch. i named it 'SKY' just because the idea keep bugging me while i listening to 'SKY' by SJ K.R.Y

enjoy ~~ :)