Live action TV
Description
Kim Kyeong-Su is a high school student who has been expelled from multiple schools due to his uncontrollable supernatural powers and his tendency to be drawn into fights, despite usually being the victim of bullies. Volcano High represents his final opportunity to complete his education, as it is the only institution willing to accept him in his senior year. Throughout his previous eight schools, he was frequently targeted by delinquents, yet it was always Kim who was punished and forced to leave for fighting.

In terms of personality, Kim is characterized as a fundamentally good person who does not seek out conflict but often finds himself in situations where violence is unavoidable. He projects an outward image of being socially awkward and aloof, fitting the typical outcast archetype. Upon arriving at Volcano High, he is determined to restrain himself and avoid any behavior that could lead to another expulsion, as failing at this school would mean having no future in academics anywhere else. This self-imposed restraint creates an internal conflict, as the school environment is one where martial prowess and power struggles are central to daily life.

Kim is motivated primarily by the desire to graduate and make his family proud, carrying the weight of his past failures and the shame they have brought to his family name. His initial motivation is purely one of survival and self-preservation, as he tries simply to avoid trouble and blend in. However, as the story progresses, he is drawn into a larger conflict involving a legendary manuscript, corrupt teachers, and the fate of the student body. He is forced to reconsider his passive stance and accept responsibility for using his abilities to restore order to the school. His romantic interest in Yoo Chae-Yi, a popular and talented student known as Icy Jade, also influences his actions and gives him a personal stake in the events unfolding at Volcano High.

Kim plays the central role in the story as the reluctant hero who must ultimately confront the main antagonist, Mr. Ma. The plot revolves around his arrival at the school, his struggles to avoid expulsion, and his eventual acceptance of his destiny as the one who can bring peace to the institution. His role is to challenge the oppressive regime of the teachers who have taken over the school and to reveal that the legendary manuscript, sought by many for ultimate power, is merely a metaphor for the need to restore order and trust among the students themselves.

The most significant relationship is his adversarial connection with Mr. Ma, a sadistic substitute teacher who has a history with Kim from a previous school. This relationship is intensely personal and dangerous, as Mr. Ma is determined to make Kim disappear, and their rivalry escalates into a life-or-death final battle. Kim also has a complex dynamic with Jang Ryang, the school bully and leader of the Dark Oxen gang. Jang Ryang initially targets Kim but comes to respect his physical attributes and threshold for pain, even inviting him to join his gang. His relationship with Yoo Chae-Yi begins with a crush and develops into mutual affection as she believes in his innocence when he is framed for a crime he did not commit. Additionally, the powerful martial artist Song Hak-rim serves as a mentor figure, recognizing Kim's potential and training him to properly master his abilities for the greater good.

The character undergoes significant development from a passive student trying to avoid expulsion to an active hero who embraces his fate and his power. Initially refusing to get involved in the school's conflicts out of fear, he slowly realizes that he cannot escape his destiny and must fight to restore order. Through training with Hak-rim, he learns to control his powers instead of letting them control him, representing a journey of self-discovery and acceptance of his identity.

Kim Kyeong-Su possesses very unusual and considerable supernatural powers, which are the root cause of his expulsion from previous schools. His most notable ability is the power to harness wave energy and manipulate water, which he uses with spectacular effect in combat. He can also project energy in more generalized forms, such as energy hurling and force blasts, and his powers grant him incredible fighting skills and telekinetic abilities. Throughout the film, he learns to master these abilities properly under the guidance of Song Hak-rim, transforming them from a chaotic liability into a precise and powerful tool for restoring peace.