Victoria Song: 23-year-old orphan, the eldest, beautiful, gentle, kind, smart. She has two sisters Krystal and Sulli. Do many different jobs such as cafes, fast food restaurants, ... just wanted to earn money to pay for the studying of her two sister.

Nichkhun Buck Horvejkul: 25 years old, group director Horvejkul, 5 years of living in America, pretty cool character. A successful man, handsome and wealthy in the eyes of women. 

Krystal Jung: 17 year old, who is also an orphan like Victoria and Sulli, Victoria, Sulli and her to leave the orphanage to independently own life, now SM High School students, beautiful and intelligent, strong personality, independent thinking, mature but fussy to Victoria. 

Sulli Choi: 17 years old, just like Victoria and Krystal, went to the same school with Krystal, a vivacious girl, fast chatter, bright shining smile, cute, adorable, love to be pampered like a baby to Victoria. 

Tiffany Hwang: 24 years old, rich lady, strong personality, assertive, exquisitely and beautiful but spoiled young to know only from herself, do everything to get what she wants.

Kangta: 26-year-old nephew of the JYP president, who is also a director of the corporation. Attentive personality, the an exemplary man, gallant. 

Taecyeon: 25 years old, a close friend of Nichkhun in Korean - USA, vivacious personality, humor, likes noisy 

Choi Minho: 17 years old, rich dude, SM High School students, like sports, openness, are easy to get along with everyone, the famous hot boy in appearance, performance and reputation of family.

Min Hyuk: 17 years old, rich dude, the a drummer in the band's popularity, as well as one of the famous hot boy of the school.