CHARACTER :

Ki Bum / Park Ki Bum

• 19 years old (21 August 1989)
• Have elder brother and youngest sister
• Senior in Neul Paran High School
• Silent and hardworking
• Tries to reveal the secret kept by his brother

Mi Hi / Kim Mi Hi

• 19 years old (30 November 1989)
• Have three elder brothers
• Kim's Corp heir's and the only daughter in Kim's family
• Loves by her brothers and sometimes act like a mommy to her brothers
• Senior in Neul Paran High School
• Sensitive but try to hide it by her boyish characters

Sungmin / Lee Sungmin

• Mi Hi's best friend
• Have elder brother
• Called as "Pinky Boy" by Mi Hi as he loves pink stuff
• Senior in Neul Paran High School

Heechul / Kim Heechul

• A 27 years old man
• Older brother for Yesung, Wookie and Mi Hi
• Kim's Corp heir's and now take over the Kim's Corp. after the death of their family
• Overprotective to his brothers and sister
• Called as "Cinderella" by Mi Hi because his feminine looks.

Teukie / Park Jungsu

• Older brother for Ki Bum and Choon Hee,27 years old
• Used to be a gangster and jobless
• Loves his brother and sister but did not show it
• Hold a big secret from his brother and sister

Choon Hee / Park Choon Hee

• Little sister to Teukie and Ki Bum
• 16 years old and a junior in Neul Paran High School
• Caring to her brothers and look so innocent to Donghae
• Always curious about the missing of her father

Donghae / Lee Donghae

• Ki Bum's best friends and in love with Choon Hee
• 19 years old and a senior in Neul Paran High School
• Love to dance and have his own band called B-Boy

Yesung / Kim Jong Oon

• Second heir's of  Kim's Corp and second son in Kim's family
• 24 years old and a senior in Hankook University
• A very troublesome person to his brother but at the same time respect Heechul as the older one

Wookie/ Kim Ryeowook

• Have two older brothers a  little sister and a heir's of Kim's Corp.
• 22 years old and a junior in Hankook University
• A silent person but loves to cook for his brothers and sister
• Always get bullied by Mi Hi especially when she get grounded by Heechul

Hankyung / Lee Hankyung

• 26 years old man and Heechul best friend
• A older brother for Sungmin
• Work for the 'President' to look for his grandsons and granddaughter

Other Characters :

• Siwon
• Kyuhyun
• Shindong
• Kangin
• Eunhyuk
• Yuri
• Snsd