This is a story of how a girl develops her feelings towards a man. At the beggining, it was just like a game, no personal attachments,  no feelings involved but how long can they continue being like this. Is it just okay to love him? Should she tell him? Even if she's not sure if he feels the same way like how she feels for him. Now, here she is, waiting for her MR. RIGHT. 

Characters:

Im Yoona

- sister of Yuri

- Kibum's girlfriend

- Seohyun's bestfriend 

- wants to find her MR. RIGHT

Choi Si Won

- a respected company manager

- likes to hang-out in the club

Kwon Yuri

- sister of Yoona

- a hardworking ambitious lady

- envies her sister

Kim Ki-bum

- Yoona's boyfriend

- doesn't believe that relationships are built by love only

Seo Joo Hyun

- known as Seohyun

- Yoona and Yuri's cousin

- Yoona's bestfriend

- Yong Hwa's girlfriend

Jung Yong Hwa

- Seohyun's boyfriend

- Yoona's friend

Kim Young-woon

- known as Kangin

- Kibum and Yoona's friend

Choi Jinri

- she's mostly called as Sulli

- Siwon's younger sister

- always on Siwon's side

Choi Minho

- Siwon's younger brother

- wants to make things better in the family

Ok Taec-Yeon

- likes Yuri

- is against Yuri's plan against her sister

Jung Soo-Yeon

- called Jessica

- co-worker of Yoona

- a close friend of Yoona

.................. and more