Nam Woohyun is 18 years old.His father is a CEO of a big and sucessful company.He also known as a playboy in the high school.His bestfriend is Hoya.He likes to bully students.

Ailee is 18 years old.She is from New Jersey but she is Korean.Her father passed away because of cancer when she still child. She moved to Korea because she wants to work and get money while studying.Her family is poor.She works and gives her salary to her family in New Jersey.

Jang Dongwoo is 18 years old.His mother passed away when he was 6 years old.He always alone as he only has an elder sister.He is very kind and likes to help people who are in needs.He is friendly and talkative.

Hoya or his real name Lee Howon is 18 years old too.His father owns many beef restaurants in Korea.He is rich too.He and Woohyun known each other since kid.He likes to bully students.