Character Introduction- Kim Hana, the main lead.
Jung Nari, Hana's best friend.
Lee Seo-jun, Hana's junior in college.
Park Ji-ho (bully 1), Hana and Nari's senior.
Cho Seung-min (bully 2), Hana and Nari's classmate.
Kim Do-yun (bully 3), Hana and Nari's another senior.
Mother (Kim Ji-young), Hana's mother.
Father (Kim Nam-gil), Hana's father.
Police Uncle (Kang Ha-neul), a police officer who adopted Hana.
The men, three unidentified figures who murdered Hana's parents.