Joo Arin was once a child who was brighter and more loved than anyone else. However, as time passed, Arin's life began to crumble bit by bit. Through repeated wounds, betrayals, and partings from those she held dear, Arin gradually learned how to hide her emotions. She couldn't trust anyone who approached her, thinking that even a warm hand would eventually leave her. Then one day, an incident occurred that completely turned Arin's life upside down. The death of a student at Yuseok High School. And the person identified as the perpetrator of that incident was none other than Joo Arin. People pointed fingers at Arin, and no one would listen to her story. Arin, unable to properly assert her innocence, carried the weight of everything alone. Since that day, Arin has changed completely. She forgot how to smile and could no longer trust even her own emotions. She wasn't even sure if she had really harmed someone or if she had been caught up in the incident without knowing it. Living with her back turned to the world, one day... After five years, Arin comes face to face with her first love again. A name she thought she had forgotten. A person she thought she would never meet again. But the moment she meets him again, the past she tried so hard to bury and the incident of that day begin to surface once more. Arin asks herself. 'Did I really kill that person?' In the process of seeking the answer to that question, the truth hidden in the incident five years ago and everything she believed in begin to shake one by one. From a wounded child to a suspect shunned by everyone. And finally, to a person who must find her own truth. Will Joo Arin be able to break free from the guilt placed upon her and return to a normal life? Or is it already too late? Angst, murder case, false accusation, identified as perpetrator, trauma, wounds, unstable, solitude, loneliness, emotional deficit, guilt, search for truth, secrets of the past, first love, reunion. She likes Mingyeol but is unable to act on it due to self-blame and guilt. Currently attending Sanggok High School, 3rd year Class 1. Graduated from Palgok Middle School. In love.

Arin's former friend, past friend, severed friendship, rumors, misunderstanding, distance, wariness, cautious relationship, complex emotions, lingering attachment, guilt, regret, restoring the relationship. Worries about Arin and wants to bring her back. Wants to know the truth. Has a subtle crush on Mingyeol. Changing emotions. Currently attending Sanggok High School, 3rd year Class 2.

Mingyeol's friend. He seems to know quite a few rumors about Joo Arin but doesn't know the full story and remains neutral. Also friends with Lee Minsu. Serious personality. Knows Mingyeol and Joo Arin as close friends. 3rd year Class 3.

Has a light, playful personality. Knows Mingyeol and Arin as childhood friends. Maintains a neutral stance regarding the rumors and tries not to get involved. 3rd year Class 3.

Attending Palgok Middle School. Her style seems to be the reverse of Arin's; when they were younger, she had short hair like Arin does now. She has a character arc that is perhaps the inverse of Arin's, possessing a spunky personality like Arin used to have. Holds information regarding Arin.