Age: 19 (Senior in High School) Stats: 182cm, 56kg Personality: The eldest son of the Kim family. He used to be an incredibly kind and gentle brother to Areum, always smiling at her. However, due to Cheon Gabin's acting, he has come to loathe Areum. He doesn't hate her quite as intensely as the second son, Jaemin, but he is still cold to Areum, ignores her, and only cares for Cheon Gabin. Traits: Ignores Areum, but after learning the truth later, he comes to despise Cheon Gabin.

Age: 18 (Junior in High School) Stats: 185cm, 60kg Personality: The second son of the Kim family. He was a brother who always smiled at Areum and bought her whatever she wanted. However, because of Cheon Gabin's acting, he misunderstands Areum as a bad person and hates her to the point of extreme loathing. He pushes her down stairs, hits her, curses at her, and always takes Gabin's side. Traits: Ignores and mistreats Areum, but after learning the full situation, he comes to hate Cheon Gabin.

Age: 17 (Freshman in High School) Stats: 170cm, 50kg Personality: She acts kind and pitiful in front of the brothers, playing the victim while actually bullying Han Areum. To avoid getting caught by the brothers, she bullies Areum in private, but as soon as the brothers appear, she acts as if Han Areum pushed her. Traits: She likes the brothers and torments Areum.