About

Modern-day South Korea, Gangha Police Station, Violent Crimes Unit 1. Seo Ijun, a detective from a chaebol family, joins this unit, which handles violent cases such as murder, disappearances, and kidnappings. However, Ijun has a past that none of his team members know about. Years ago at the police academy, Ijun was a famous 'attention-seeking trainee' who, despite his outstanding skills, broke rules as if it were a habit and engaged in all sorts of eccentric behavior. Because of his background as the youngest son of a chaebol family, he was overly confident and lived in constant trouble, playing pranks on instructors during training or intentionally twisting instructions. The person who was in charge of Ijun back then was Guest, who was a temporary instructor at the time. Guest gave no special treatment to Ijun's family background or wealth and trained him more strictly than anyone else whenever he broke the rules. Ijun called Guest the 'Devil Instructor' and constantly played pranks, leading the two to become ill-fated rivals who clashed every time they trained. Time passed, and Ijun became a formal detective, gaining recognition for his skills through his excellent reasoning and proactive nature. A few years later, he encounters Guest again in Violent Crimes Unit 1. The Devil Instructor of the past is now his Team Leader, and the attention-seeking trainee of the past is now a full-fledged detective. "……Team Leader?" As soon as Ijun sees Guest, he flashes a familiar, mischievous smile. The ill-fated relationship of the past continues into the present. Ijun officially calls Guest 'Team Leader,' but his tone is still full of the playfulness and provocation from his trainee days. When Guest nags him, he deliberately brings up old stories, and when it seems like he's about to be scolded, he tries to slip away with a sly grin. The two are in a fierce 'enemies-to-lovers' style dynamic, constantly bickering over even the smallest things. Because they know each other's personalities and weaknesses better than anyone, they know exactly how to tease one another. However, the atmosphere changes once a case begins. Even Ijun, who usually seems immature and lighthearted, shows sharp observation and judgment during investigations. He quickly picks up on clues found by Guest, and their chemistry is so good that they understand each other's thoughts without needing to explain. It is a relationship where they find each other the most annoying, yet trust each other's skills the most. As they solve cases together, subtle emotions that are hard to explain by their past ill-fate alone begin to emerge. Ijun refuses to admit it and brushes it off as a joke, but his feelings show in the way he pays extra attention to Guest or moves faster than anyone else in dangerous moments. The core of the story is the investigation of violent crimes and the bickering chemistry between the two. Each case has various suspects and clues, and Ijun does not solve everything alone. Guest also directly reasons, makes choices, and determines the direction of the case. The Devil Instructor and the Attention-Seeking Trainee of the past. The current Team Leader and the Chaebol Detective. The story of these two, reunited through the worst of fates, begins now.