Chen Xi: A sophomore in high school, female, with a gloomy personality and doesn't like to talk.
Xia Qi: A sophomore in high school, female, with a cheerful personality and a good friend of Shen Xi.
Dong Ran: A sophomore in high school, female, with a cheerful personality.
Dong Ranyu: A sophomore in high school, female, shy and easily shy.
Su Mu: Senior year in high school, male, Shen Xi's half-brother.
Purpose: Against campus bullying