Tiffany Hwang also known as Fany or Miyoung. Tiffany went back to South Korea with her family. Her Father Stephen Hwang the new CEO of Hwang Advertising Corporation, decided to go back because of the problems that the company is experiencing right now. Tiffany grew up in the California and she doesn't speak hangul fluently unlike her brothers so for her living in Korea is really frustrating. Her brothers are Leeteuk and Kyuhyun they love her because she's the maknae. But sometimes Kyuhyun tends to get bored that why he picks on her sometimes. She loves music, literature, and PINK. She has this saying that "Everything. Pink. MINE." Tiffany is a bubbly out-going caring person. She doesn't want to see people who are close to her getting hurt. She will miss everything about California but one thing is for sure she will leave every feelings she had for Taecyeon. Or not?

Siwon Choi also known as Andrew (his english name) is the only son of Jin Choi owner of Choi Jin Mi Corporation. He's a gentleman and has a great passion to music and acting. But his father wants him to study Business Adminitration for College to continue their company because he is the only son they have. He have two siblings namely Sooyoung and Seohyun. Siwon is the type of guy who doesn't fall in love before. Until he met Tiffany Siwon realizes what love is. Will Siwon win Tiffany's heart? 

Taecyeon Ok the son of Jaeho Ok CEO of Ok Magazine Company. He's a trouble-maker in school back in California. His father sent him to Korea to change his attitude because he will inherit their company in the future. He has this 'Bipolar' attitude when it comes to Tiffany. Back then in California he loves to tease Fany but he actually cares for her when she got hurt because of her clumsiness. Taecyeon is a playboy before but when he realize that he'd fallen for Tiffany; now he wants to change everything. He wants Tiffany to love him again but how he will gonna do it if Siwon is in his way?

Jessica Jung the daughter of David Jung the owner of Jung Corporation. She will be the heiress of her family since she's the eldest. Jessica has a sister name Krystal and they're really close to each other. She's really cold towards other people at first but she's really nice when you get to know her. Jessica loves to sing but she's not showing it because she doesn't want to draw any attention from others. She's really smart too most likely a genius. Because even if she sleeps in class she always gets the correct answer when the teacher ask her. Will Jessica finally meet her match?

Donghae Lee Son of Daniel Lee the owner of Lee Enterprise. He's a genius in school that's why the professors always ask him to have special classes for the needy ones. Donghae is the bestfriend of Siwon since they were kids. He always covers up for his friend especially when it comes to going late in classes. He is only child that's why he treats Siwon as his own brother.  He is a very charming and out-going person that's why most of the students in school likes him. Like Siwon He doesn't experience falling inlove until he met Jessica Jung. Will Donghae capture the ice princess' heart with his charm?

Sooyoung Choi also known as Aindrea (her English name). She’s the eldest daughter of Jin Choi. Sooyoung loves to eat like she actually eats everything that is edible by human. Like her brother Siwon, she loves acting maybe it runs in their blood. She loves dancing and fashion too. Height and weight is not an issue for Sooyoung because the Choi’s are really tall people and in terms of weight she never gets fat because of high metabolism. When it comes to her siblings she’s close to both of them but sometimes she opens more to Seohyun. Sooyoung is a hopeless romantic person and she believes that love can wait. Will Sooyoung find the man of her dreams? Or she will just wait until the right time comes along?

Seunghyun Choi also known as Adrian. The youngest male son of Jin Choi. Seunghyun is a happy-go-lucky guy who is envious of his older brother Siwon. He hates being compared to him that's why they are not so close with each other. He loves to cut classes, goes to street fighting, and has a passion to music especially rapping. He wants to show his parents that he has a potential in this kind of career. But his father objects it that's why he was sent to in a special school in Japan to make him focus on his studies. His progress their was unremarkable that's why Jin Choi let him came back. Little did he know that his brother is more envious of him because of his personality that can capture a woman's heart especially Siwon's first love. Will Seunghyun be a change person now or he will just be envious of his brother again and steal the girl of Siwon?