MAIN CHARACTERS

Choi Joohyun/Choi Seohyun, a kind and polite girl who came from a countryside. She faced the real world when her father died after saving a child from a tragic car accident. After the accident, her mother decided to keep the child because the child doesn't know where he came from. Joohyun took care of him and they became childhood sweethearts. However, the child's parent found him and took him away from them. Since then, they haven't seen each other. Being the optimistic girl she is, she moved to the city in order to pursue college and to help her family at a young age. There, she met the child who was saved by her father. They went in the same university and they became a couple. But then, conflicts has started when the mother of her lover opposed to their relationship. How will Joohyun face all the obstacles that will come in her way? How will she become Seohyun?

Byun Baekhyun, the cold-hearted and quiet heir of his father's company. He is a popular guy in their university but his heart is longing for one girl. The one who took care of him when he was saved from a car accident. She was his first love. Fate has decided to bring them together again when he saw him again in the university he's attending. They became a couple but his mother opposed to their relationship. What will he do if he learned that he is engaged to someone he doesn't really love? What will he do if he learned that his love moved away to go abroad?

Hwang Miyoung/Tiffany Hwang, a friendly and joyful girl who is the heiress of her mother's company. However, her goal in life is not to be a heiress but to be a famous actress and singer. She went to the States to chase after her dream and there she met her new friend, Joohyun. Once she goes back to Korea, she will meet her fiancé once again. What will she do if she learned that her fiancé and her best friend were lovers? Will she succeed in reaching for her dreams.

Oh Sehun, a young CEO of a prominent company in the States. He is a smart and kind guy with a cold heart until he met Joohyun. He became friends with her and he slowly fell for her. Once he knew her story, he offered her a help in order for her to get revenge from those people who hurt her. He will be the one who will transform Joohyun into Seohyun. What will he do if Seohyun is still in love with her former lover?

SUPPORTING CHARACTERS

Choi Jongin, the younger brother of Joohyun who is really mad to Baekhyun because he blames him for his father's death. He will do anything to make Baekhyun suffer.

Kim Junmyeon, one of Joohyun's friend who secretly likes her. However, when he learned that Joohyun and Baekhyun were already a couple, he just decided not to pursue his love for her and just be friends with her.

Kim Taeyeon, Joohyun's senior in her university who will become her close friend and treat her as a sister. She will support and help Seohyun in anyway she can.

Jung Sooyeon, Joohyun's senior in her university who will also become a close friend and treat her as a sister. However, unlike Taeyeon, she will oppose to Joohyun's relationship with Baekhyun because she thinks he is not good for her little sister.

Lee Soonkyu, Baekhyun's crazy fan girl who will make fun of Joohyun after she learned that she is Baekhyun's girlfriend. She will make Joohyun's life a living hell.

Mrs. Byun, Baekhyun's mom who will do anything for Baekhyun and Seohyun to be broken apart. She is very protective of her only son.

Mrs. Choi, Joohyun and Jongin's parent who is kind and thoughtful. She is very protective when it comes to her children.

Mr. Choi, Joohyun and Jongin's parent who died after saving Baekhyun from being hit by a car.