Kim Hyo Jung/Hyorin

- 21 years old

- working in her daddy's company, going to be the CEO in the future

- rich, but never told anyone in high school except Bora, Soyou and Dasom

- went to high school with Bora, Soyou, Dasom, him and his group of friends

- cheerful, obedient, caring towards loved ones, bubbly, but mischievous at times

Yoon Bora

- 21 years old

- a rapper

- quite rich from her pay

- went to high school with Hyorin, Soyou, Dasom, him and his group of friends

- cute, friendly, sweet, talkative, most motherly out of the sistar members, sporty

Kang Ji Hyun/Soyou

- 20 years old

- a model

- quite rich from her pay

- went to high school with Bora, Hyorin, Dasom, him and his group of friends

- cold to unfamiliar people but very open with sistar, sporty, eloquent speaker, like to go shopping

Kim Dasom

- 20 years old, the maknae

- working in her daddy's company

- rich but never told anyone in high school except Bora, Hyorin and Soyou

- sweet, shy at times, thrifty, friendly, a cutie pie

Him

- 21 years old ( Just pretend ok, I know he is younger than Hyorin in real life)

- used to date Hyorin in high school but broke up

- likes hanging out with his group of friends

- more info about him will be put into the story