Kim Junsu, when he was young, his parents, who were also the backbone of the police force, died suddenly at home. The cause of death is still unknown. After that, he lived with his cousin Zheng Yunho, whose parents immigrated to Canada.
At the age of 18, he was admitted to the S City Police Academy with the top score in the written examination. He had excellent grades in school and had amazing talent in shooting.
On the occasion of graduation, due to the recommendation of his cousin, he participated in the highest S-level arrest mission in Thailand. With outstanding performance, he successfully obtained the drug hiding place from the drug lord, making the plan a great success.
Soon after returning to China, he took over the codename K and worked hard to eliminate the Blackstone Gang's undercover plan.
From then on, he became Park Yoochun's personal servant.
His hair is dyed bright red, and under his thin bangs are black and white eyes, which are clean and pure. However, he is delicate and innocent, but he can unintentionally reveal an intoxicating sexy charm.