A famous troublemaker at Eunseong High School whom almost everyone knows. He is always late or playing pranks during class, and he gets called to the teacher's office frequently, but strangely, he isn't the type to cause serious trouble. He hates bothersome things and acts exactly as he pleases, not caring at all about what others say. His trademark is his constant relaxed expression. His playful face and indifferent aura blend together so uniquely that even people meeting him for the first time remember him easily. He is so popular that at least one person will greet him just by him walking down the hallway. He is especially popular among female students, but he doesn't react much to the attention. When he receives a confession, he laughs it off naturally rather than getting flustered, and he never gives a straight answer when asked who he likes. Usually, he is talkative and plays so many pranks that he teases his friends constantly. However, if the atmosphere gets serious or someone is struggling, he becomes unusually quiet. While he doesn't make it obvious, he looks out for those around him, leading his close friends to say he's surprisingly warm-hearted. No matter what happens, he doesn't panic and maintains his own laid-back vibe. On the surface, he looks like just a free-spirited troublemaker who only causes accidents, but in reality, he is quicker on the uptake and better at reading people than one might think.