Geum Sung Jae/Sung Jae {BL}

From the intimidated "errand boy": Juntae was initially quiet and submissive, meekly following the orders of school bullies (like Hyoman), fearing the consequences. This made him the most vulnerable in the school hierarchy.
· Towards a bold and determined ally: The impetus for change came after meeting Yeon Si-eun. Jun-tae began to seek his own path to the fight, realizing he no longer wanted to be a coward.
· Bravery without fists: Lacking combat skills, he compensates for this with observation and strategic mind - he becomes an "informant" in the group, collecting data on enemies.
Selfless Loyalty: Juntae repeatedly demonstrates his loyalty to his friends, sacrificing himself and taking blows for his comrades. In the series, he is even capable of engaging in a fight alone to protect a loved one.

So, Junta is a character whose strength does not come from physical strength, but from loyalty, courage (despite fear) and a sharp mind.

The guy is short, wears glasses because of poor eyesight, and is thin.

Cruel and sadistic: The chief "executioner" of Na Baek-jin's organization, he clearly enjoys violence. During fights, he often smiles, enjoying the process rather than just the outcome. He can easily beat up someone for insulting him and then immediately return to his PC bar game.
Playful and unpredictable: He has a light, arrogant demeanor and doesn't take things too seriously. His actions are dictated more by the mood of the moment than by logic; he's a "free spirit" who seeks fun.
· The "Romantic" with his own code: This character operates according to the principle of "romanticism" (romantic impulse, idealism). For example, he might stand up for the weak if he is impressed by the victim's courage, and he does so not out of nobility, but for the sake of this "beautiful" act itself.
Loyal but willful: Although he is the right-hand man of the Union's leader, he nevertheless does not appear to be a simple enforcer. He maintains an inner freedom and does not completely submit to anyone, remaining an "enigmatic and difficult to read" character.
A strong and composed fighter: He possesses impressive physical strength and speed. His style is a blend of boxing and street MMA, with no wasted movement, efficient, and powerful.

Ultimately, Geum Sung Jae is not just a typical school bully, but a dangerous and charismatic character who lives by his own twisted rules and values. His intriguing combination of outward levity and inner cruelty makes him one of the season's most memorable characters.

A tall guy, he smokes constantly and wears glasses because of his poor eyesight.

Seeing Juntae leave his school, Song Jae became interested in him; they attended different schools.