12 students were chosen to live under one roof. They are all from different country's and go to different kind of schools. 

Boys

Aiden Jay Liu Yiyun:

-18 years old

-Millitairy school

-China

-Wants to join the army when grown up

-Three older brothers

-Kind of player (but doesnt do it on purpose)

Choi Sooyoung:

-19 years old

-Chef school

-France

-Wants to be top chef when grown up

-Has one brother and one sister

-Innocent lover

Seo Joo-Hyun:

-18 years old

-Scientistic school

-Russia

-Wants to work as scientist or for nassa when grown up

-Only child

-Inoccent lover

Kwon Yul:

-18 years old

-Sports academy

-Greekland

-Wants to be professional sporter when grown up

-Has an older sister

-Player

Kim Taeng:

-20 years old

-Music school

-Germany

-Musician when grown up

-Has a younger sister

-Player (Doesnt do it on purpose though)

Nico Jung:

-18 years old

-Dance school

-Australia

-Professional dancer when grown up

-Only child (Thats what he thinks)

-Inoccent lover

Girls

Krystal Jung Soo-Jung:

-18 years old

-Fashion designer school

-America

-Fashion designer when grown up

-older sister

-Hard to get

Jessica Jung Soo-Yeon:

-19 years old

-Fashion designer school

-America

-Fashion designer when grown up

-younger sister

-Hard to get

Sunny Lee Sunkyu:

-18 years old

-Acting school

-Thailand

-Professional actress when grown up

-older brother

-Hard to get

Im Yoona:

-19 years old

-Arts school

-Italy

-Art industry when grown up

-only child

-Player

Tiffany Hwang Miyoung:

-19 years old

-Modelling school

-England

-Professional Model when grown up

-Only child

-Player

Kim Hyoyeon:

-19 years old

-Dance school

-Canada

-Professional dancer when grown up

-Older brother

-Player