Bad Kids Sticker Chart follows Gunwoo, who receives several bad marks and can't understand why. Even when he tries his best, his teacher only focuses on the results, leaving him upset and frustrated. In anger, Gunwoo flushes the teacher's stickers down the toilet, and to make matters worse, his teacher finds the notebook where he had written complaints about her. Instead of scolding him, the teacher offers to listen to his story. Through open and honest conversations, the characters reflect on their mistakes and resolve misunderstandings, overcoming their conflicts.