Kim Haerin is the only girl in the family. She has four older brothers. Their parents died when she was four.

She recently moved to Seoul with her older brothers. She is joining a new school but little did she know that many unexpectable things are going to happen there.

Characters:

Kim Haerin (you)

- 17 years old

- cute, childish, innocent, naive

- good in art

Lee Joon (Lee Chang Sun)

- 23 years old

- mature, patient, strong, secretly rich

- teaching P.E. and supervising Art Club

Gong Chan Shik (GongChan)

- 18 years old

- Haerin's best friend

- kind, owns a cute scooter

- has a secret crush on Haerin

Nicole Jung (Yong Joo)

- 20 years old

- Haerin's best friend, acts like her unnie

- cares about Haerin a lot

Krystal Jung (Soo Jung)

- 17 years old

- Haerin's childhood & best friend

- cute, innocent and naive like Haerin

Bang Minah

- 22 years old

- Joon's fiance

- two-faced , loves money

- sophisticated, really annoying

Brothers:

Kim Taecyeon

- 23 years old

- Haerin's oldest brother, the "tough brother"

- always there for Haerin when she's in trouble

Kim Haewon

- 20 years old

- Haerin's second brother, the "cool brother"

- acts like he doesn't care about Haerin

Kim Myeongsu

- 19 years old

- Haerin's third brother, the "protective brother"

- the closest to Haerin and knows all her secrets

Kim Taemin

- 18 years old

- Haerin's fourth brother, the "cute brother"

- innocent, silly and afraid of his hyungs