As JTBC’s weekend drama Good Boy continues to heat up, Park Bo Gum is winning over audiences with his fiery charisma and unwavering pursuit of justice as ex-boxing champion turned cop Yoon Dong Joo.
Dominating the drama buzz rankings for five straight weeks, his no-nonsense lines have left viewers breathless just like a KO punch. Here are the Top 5 most iconic quotes from Yoon Dong Joo that hit hard and go straight to the heart.
#1. “No one is born kind. You try to live kindly.”
When he urges his troubled junior Kyung Il to be a better son, the younger boxer scoffs, “Only someone born good can act like that.” But Yoon Dong Joo calmly rebuts, “No one is born kind. You try to live kindly. Because I don’t want to regret it.”
This line echoes the spirit of poet Yoon Dong-ju’s famous wish to live a life without shame, revealing the heart behind the character’s unyielding integrity.
#2. “Anyone who steps into my round always goes down.”
Facing off with the sinister Min Joo Young (Oh Jung Se), who has manipulated an innocent man into a false confession and even instigated murder, Yoon Dong Joo doesn’t flinch.
A former undefeated champion with 21 KOs, he delivers this ice-cold warning: “Run if you can. Anyone who steps into my round always goes down.” The line signals the beginning of his righteous counterattack.
#3. “Impossible is nothing.”
Despite Min Joo Young’s smug escape from justice with help from the mayor and prosecution, Yoon Dong Joo doesn’t back down. Quoting legendary boxer Muhammad Ali, he proclaims: “Impossible is nothing.”
The line captures his relentless will to chase justice—even when the system seems unbeatable.
#4. “To catch bad guys, you don’t ask who the mayor is. You just catch them.”
As Yoon Dong Joo’s special task force faces overwhelming odds against a multinational crime cartel involving corrupt city officials, doubts start to surface. But Dong Joo cuts through the hesitation: “To catch bad guys, you don’t ask who the mayor is. You just catch them.”
With sheer grit, he leads the team to seize a major drug shipment, cracking open the cartel’s armor.
#5. “If you fall, you get back up grit your teeth. If you run away out of fear, you’ll never do anything.”
Encouraging a child who lost their father in a hit-and-run, Yoon Dong Joo shares his fighter’s spirit: “If you fall, you get back up grit your teeth. If you run away out of fear, you’ll never do anything.”
It’s a philosophy that’s carried him through countless beatings and setbacks—and it’s what’s driving his mission to dismantle the corrupt underbelly of Inseong City.
With only six episodes remaining, Good Boy is hitting its dramatic stride, and Yoon Dong Joo’s journey is far from over. As Park Bo Gum continues to deliver knockout performances, fans can catch the action every Saturday at 10:40 PM and Sunday at 10:30 PM KST on JTBC and globally via Amazon Prime Video.
