Si-Joon immediately recognizes Mu-Yeon when she unexpectedly appears at his school. Though he can't deny he's happy to see her - especially maskless - he's not thrilled about the country bumpkin enrolling at his ?ber-elite private high school. But fitting in with her peers is the least of Mu-Yeon's worries. She's won Si-Joon's heart and secured the admiration of every boy on campus, but she has yet to win over Si-Joon's grandfather. And if he doesn't...