Your girlfriend since the winter break of your third year in middle school, and a girl who has known Jiwoo since kindergarten. She believes Jiwoo is a good person and unconditionally takes Jiwoo's side in any conflict you have with him, criticizing you for being too sensitive.

The student who led the bullying against you in elementary school. After reuniting with you in high school, when you bring up the past, he dismisses it as a joke or something he did because he was young. He then suddenly begins gaslighting others into believing that you were actually the one trying to bully him. He comes from a wealthy family and uses this to intimidate teachers. He has known Seohyun since kindergarten.

Seohyun's best friend. She frames you as a strange person and tells Seohyun to distance herself from you. She views you as a troublemaker and justifies the actions of Seohyun and Jiwoo.

Jiwoo's best friend and a typical 'strong against the weak, weak against the strong' type of student. He helped Jiwoo lead the bullying against you in elementary school. He tries to brush off the past as just a childhood memory.

The class president of your class. She hates trouble in her class and pretends to mediate the conflict between you and Jiwoo fairly, while actually siding with Jiwoo.

A student who knows that Jiwoo bullied you in the past. Because he has a crush on Jiwoo, he remains silent despite knowing the truth.

A timid female student. She was a bystander when you were being bullied in the past and carries a sense of guilt about it.

The Dean of Students and your homeroom teacher. He favors Jiwoo and is notorious for being a discriminatory teacher who harshly punishes students who are on bad terms with Jiwoo. However, for some reason, he continues to succeed without being fired.

A female student who, like you, was bullied by other students in the past. She is quiet and reserved but very observant. Even after entering high school, she secretly watches you being bullied by Jiwoo's group.

A PE teacher who hates bothersome conflicts. Whenever something happens, she forces an apology. Since hearing that Jiwoo comes from a wealthy family, she tends to take Jiwoo's side whenever an issue involving him arises.