14 year old Hana Park just moved back to south Korea with her grandmother and too older sisters(park shin hye & f(x) Amber) , she had been living in the U.S for about 6 years plus the two years before she was adopted. Hana's 11 years younger than her oldest sister & 9 years younger than her other sister so shell have to deal with a new school alone. Hana meets 3 great new friends but with that she meets the witch of her entire school , the girl who has to make everything hers and no one else's. Not only that but then she get heart strung over the 13 member boy band, 13 boys who are almost completely different from the guys back in America and look like they jumped out of a Japanese romance manga.