Do you have someone that was born on the same day as you, Has lived with you your whole life, But you two dont look the same or act the same. Kim Hanna(HyoYeon) and Anna(TaeYeon) are unidentical  twin sister, who moved from New York City to Seoul, South Korea-where trouble, love and drama awaits them- along with their cousins, Mia(SeoHyun) and Aya(Yuri).

 Kim Anna and Hanna 

Unidentical twin sisters, who are very different. Hanna is cold, judmental, rebellious, wants to stand out,and a dancer. Anna is girly, sweet, spoil, wants to fit in, and a singer. They seem to hate each other, but they actually care about each other.

 Mia and Aya Lee

Unlike Hanna and Anna, they are both very close and will do anything for each other. Mia is book smart, innocent, and friendly. Aya is charismatic, street smart, dancer, and a bit of a rebel.

 Park Jae Jin

He is thehot and pretty bad boy, who is always in either the principals office or detention. When he meets Hanna for the first time, he falls for her, because of her personality and how she is the only one that stand up to him.

 Jo In Woo

A troublemaker with a very deep and y voice, who like Jae Jin, loves trouble. Is dating Jae Jin's younger sister and is the captain of the football team. 

 Oh Soo

A very charming guy, who is very quiet and has a very cold aura about him. Falls for Aya, though their personalities are different, but he sees her as a very interesting person.

 Choi Hyun

A playboy, who doesnt believe in love and rather play with girls heart, instead of treating them well. When he meets Mia, he falls for her instantly.

Park Jae In

She is spoil, mean, and egotistical to everyone around her, and becomes enemy with Hanna, but becomes bestfriends with Anna as they are both very alike.