Wooyoung transferred to a new university.  He's excited because he will be with his best friend, Junho,  again.  But because of a simple request, Wooyoung accepted to become a tutor.  A tutor to a man named  -- Nichkhun.   Would Wooyoung be able to overcome his problem about Junho? Would Nichkhun be able to forget his past because of Wooyoung? What would Wooyoung do when he'll learn that Nichkhun is a genius?    

Nichkhun was Wooyoung’s savior when he was kidnapped.  Because of what he did, Wooyoung’s  father decided to keep him as their house help.  Wooyoung found himself liking Nichkhun more and more everyday but he was ever the gentleman.  As time passes, Nichkhun continued to be the gentleman he knew and made Wooyoung fell deeper for him.  But Wooyoung found out Nichkhun’s secret — that the whole time he had spent with him, Nichkhun was only hiding behind the mask.   

For the thirteen year-old Wooyoung,  Nichkhun was the one who fulfilled his dream as his knight in shining armour.  He was always there when he was in trouble, that's why he did everything to make Nichkhun fall in love to him. But Nichkhun left, leaving him with a broken heart. After ten years, Nichkhun went back to Seoul.  He's now a lawyer and he will be spending his vacation to the place where he grew up.  Wooyoung can't feel the excitement in his heart.  Instead, h