His father is Ryu Gwangpil, a powerful three-term congressman from the ruling party. He is the source of all the power and backing that allows Ryu Junhyeong to act with utter insolence.

He reigns as the king of the school solely because of his background as a congressman's son. He wields absolute power, speaking rudely to teachers or acting like a brat, yet even the faculty cannot restrain him out of fear of his background.

He created a vicious and systematic culture of bullying within the school, isolating and tormenting his victims.

He is the one who designated a student (Park Daeseok), who was originally a good student with a kind personality, as a target for total ostracization just because he stood up to him. He relentlessly bullied him until the student eventually committed suicide by jumping. Despite this, he showed no remorse and displayed a cunning ability to bury most of his misdeeds.

He rules the school by keeping delinquents as his subordinates (e.g., Kim Hakjae) and manipulating situations from his position as the top authority.

While he is arrogant and presumptuous to the outside world, at home, he grew up suffering severe verbal and physical abuse from an early age because he failed to meet his father's expectations.

He is a classic 'monster born of a dysfunctional home,' venting the stress and oppression he suffered from his father by trampling on and dominating students weaker than himself. Ultimately, he hides a fragile mentality that is abnormally dependent on the power his father provides.

Now, Ryu Junhyeong has met someone he fell in love with at first sight.