A truly uncanny Counter who possesses the ability to summon the 'Territory' and surpasses his limits at every moment. With his hair grown long and fluttering as he chases demons, the twenty-year-old So Mun is 180 degrees different from his high school self, who walked with a limp and was bullied by delinquents. Not only can he control the Territory at will, but he has also developed powerful psychokinesis, even taking charge of training the other Counters. If there is one thing that hasn't changed, it's that he never turns a blind eye to injustice. Just like the high schooler who couldn't ignore bullies, the twenty-year-old So Mun cannot pass by those who torment the weak or the good. Who could stop this young man from doing what is right? So Mun still believes that if he just does what he can, the lives of the people he meets will improve, even if only a little. As the number of people he must protect grows, the shadows of increasingly powerful demons loom over him! He is determined to protect everyone, but he is also afraid. What if... what if the demon is stronger than me? His responsibilities and burdens grow as heavy as his powers. But always by his side are his reliable colleagues! That's right, it's not a lonely fight. With everyone together, he no longer fears any demon. He believes that as long as they are together, they can protect their precious ones. But in an instant, the boundary between good and evil collapses. The line between the precious person he wants to protect and the demon he must fight has blurred. The one standing in So Mun's way now is Ma Ju-seok, who was once his benefactor and hero. Ju-seok was the one who threw himself into danger to save So Mun's grandmother from falling off a roof. Having lost everything to a fraud case, Ju-seok has completely changed due to his rage... Can So Mun's conviction to save everyone and his hope that a good heart still remains within Ju-seok be preserved?

After summoning the demon Ji Cheong-sin, Mo-tak returned to the police force. Thus began his double life as Detective Ga Mo-tak and Counter Ga Mo-tak. This was based on Yung's judgment that since demons only inhabit evil people, Mo-tak's return to the force would aid Counter activities. As he defeats demons, his performance as a detective steadily builds up, since most cases that seem beyond human capability involve demons. He always catches the culprit in a flash under the pretext of going to the bathroom. While his colleagues' suspicions grow, Mo-tak heads to the bathroom again today. There are just too many of those demon bastards! The problem is that Mo-tak's abilities as a Counter aren't improving as much as expected. Before So Mun appeared, Mo-tak was the number one Counter in Asia. After going through shock, anger, and depression, he should be at the stage of accepting his current skill level, but Mo-tak's shining self-love never bends. It is a basic principle for a police officer to exclude personal feelings when dealing with criminals. For a Counter, a demon is just a demon, and it's natural not to get involved in personal emotions. Therefore, whether as a Counter or a cop, there is no mercy in Mo-tak's eyes when he looks at a demon.

She smirks when she's happy, hides when she's sad, and gets defensive when her emotions are caught. As a psychic who can sense demons and read memories, if she reads the memory of a subhuman scoundrel, she uses her fists instead of words. With her characteristic grit, Ha-na shows the fastest progress in psychokinesis and speed training. Her desire to lighten So Mun's burden and responsibility is the reason for her blood-sweating effort. In other words, Ha-na is actually a very warm person; she's just clumsy at exchanging 'emotions' with others. Was it a coincidence or fate that Ha-na met her first love, Do-hwi, again? Do-hwi, who keeps approaching her with an innocent face, is someone who remembers Ha-na not as 'Counter Do Ha-na,' but as the high schooler who laughed and cried normally. The more time she spends with Do-hwi, the more she finds herself smiling like she used to. But now, with the appearance of powerful demons who have absorbed the Counters' abilities, her role as a Counter has become paramount. To her, such personal feelings are... yes, a luxury. But then Do-hwi falls into danger because of a demon. As a Counter who has always done her best and as a woman trying to protect her first love, Ha-na throws herself into the fray to save him! No one can withstand a venomous, determined Do Ha-na.

Ha-na's first love and a piano academy teacher. Ha-na was always the first love tucked away in a corner of Do-hwi's heart. In the past, after the tragedy that struck Ha-na's family, Do-hwi silently stayed by the side of the comatose Ha-na. Then one day, she suddenly disappeared and couldn't be found anywhere—until she appeared before his eyes like a lie! Unaware that Ha-na is a demon-hunting Counter, Do-hwi brings up fresh memories of the past, but Ha-na, who feels quite different from before, draws a line between them.

Chu Mae-ok, Choi Jang-mul, Na Seok-bong