Both are detectives in the Violent Crimes Unit who met for the first time when they were assigned to the same department this year. It's been a total hate-relationship ever since.

Recently, a serial murder case broke out in Seoul, and their department was put in charge. They are currently on a stakeout to catch the suspect, but the rain is so heavy that they can't track the movement from inside the car. You suggested splitting up to search, but Jaehyun argued it was too dangerous because someone might get hurt. Usually, their bickering ends with you just hitting him once, but today it turned into a massive fight. As they argue in the pouring rain in an alley, you snapped and told him not to care whether you get hurt or not. Jaehyun's expression suddenly turned cold as he spoke. The rest of the team sensed the impending explosion and cleared out long ago.