Characters:

 Tiffany Hwang  "FRIENDS that's what we are, I guess it's too late for us to be again"

The leader and the eldest from the group in terms of months. Age 21,the iest among them all and a party girl. She also have her own jewelry business/store called "Fany Fany Jewels"

Kim Hyorin "BESTFRIENDS and only that, when will you notice my feelings for you?" 

The clown of the group. Age 21, She have a great voice. She works as an Interior Designer and if she's in the mood, she's part-timing as a singer in cafe/bars.

Seo Joohyun "Aissh~! That guy he's the one who let me go but now he's getting me back"

The sweetest member of the group. Age 21, A fashionista and loves music. She's an Editor-in-Chief of the GLAM magazine and sometimes a model.

 Im YoonA "This is not right, still having my feelings for you even though I have a boyfriend"

The face of the group and the richest. Age 21, she really loves dancing and designing clothes. She's the heiress of their clothing company.

 Suzy Bae "What a life.... My crush when i'm still a HS student has crush on me now?"

The Shikshin of the group but doesn't gain weight. Age 21, She really loves hiphop and FOOD of course. She's studying  Journalism.

 Goo Hara "I wonder when will I meet my MR.RIGHT? I hope it's not too late"

The Always Broken Hearted Girl, that's what her friends calling her. She studied in France to be a make-up artist.

 Krystal Jung "Aigoo~ From all the guys that I dated, why can't I find the right guy?"

Even though she's the youngest and have an innocent face, she's a playgirl. Age 20, works as a professional photographer and always the one incharge to take care of the cafe.

 Choi Siwon "For you we're only friends but for me i'll not stop loving you"

Heir of their company. Ex-bf of Tiffany but agreed to be friends with her since that was Tiffany's favor after their break-up. Age 23, still have feelings for Tiffany.

 Lee Joon "am I really that dumb? It's too late already she's gone"

His family owns a car repair shop business that's popular in Seoul. Age 22, Bestfriend of Hyorin.

 Jung Yonghwa "I regret that I let her go but it's not too late fro us to be again, Fighting JYH!"

Age 21,The playful leader of CNBLUE, actor and a model. Ex-bf of Seohyunwhen they were in US.

 Lee Donghae "This is all my fault! It's too late for us, we both have our own lovers"

His family owns a resort in Singapore. Age 23, Ex-bf of Yoona who he loves 'till now and current boyfriend of Eun Seo.

 Ok Taecyeon "I'm her boyfriend but starting that guy showed up, something's change"

Age 21, current boyfriend of Yoona.

 Kim Soohyun "She's really beautiful now than before,why didn't I notice her?"

Age 22, A famous actor in S. Korea.

 Jung Junhyung "That woman is really pretty, I hope I can meet her again"

Age 21, A member of an Idol boy group BEAST.

 Choi Minho "Maybe that is the girl that i'm waiting for, she's challenging me huh."

Age 20, owns a famous bar in Seoul and popular with girls