Kim Taeyeon-19 years old university student at Soshi university; she is cold towards other people besides her cousin Hyoyeon and her friends Yoona,Sunny; she became like this after revealing that her ex-girlfriend Tiffany Hwang had been cheating on her for 2 months.        

Kwon Yuri-19 years old university student at Soshi university;she is rich and a player,but fell in love at first sight with Taeyeon the first day she transfered(Taeyeon);has best buddies Sooyoung,Hyoyeon,Yoona,Sunny;popular at university.

Tiffany Hwang-19 years old student at Seoul university;she is a player,ex-girlfriend of Taeyeon,but wants her back;she is friends with Jessica Jung;rich,spoiled girl who gets what she wants. Kim Hyoyeon-19 years old student at Soshi university;cousin of Taeyeon,best friends with Yuri,Sooyoung,Yoona and Sunny;hates Tiffany because of what she did to Taeyeon.

Additional characters:Jessica Jung,Im Yoona,Lee Sunny,Choi Sooyoung.