Hwa-Jin

Physically, he is described as a man with black hair. He dresses predominantly in black and is known for his stoic character, his great analytical skills, and his unwavering sense of justice, which he dispenses in his own way.

In his military past, he sported short hair and a clean-shaven face. His life changed drastically after the murder of his fiancée, Gayoon, at the hands of the criminal Cho Gyu-cheol. In her memory, he grew his hair long as a sign of mourning and has dedicated much of his life to fighting corruption and dismantling criminal organizations.

Na Hwa-jin is a cold, calculating, and ruthless government inspector. He leads a special team tasked with restoring order in out-of-control schools, confronting violence, bullying, and abuses of power by parents and students when the education system fails.