Kim Mu-yeol Opens Up About His Difficult Past After Netflix Hit ‘Teach You a Lesson’ Tops Global Charts
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Kim Mu-yeol is experiencing one of the biggest moments of his career, but his recent appearance on ‘You Quiz on the Block’ reminded viewers that his path to success was anything but easy.

The actor appeared on the July 1 episode of tvN’s ‘You Quiz on the Block,’ where he spoke with hosts Yoo Jae-suk and Jo Se-ho about his difficult early years, his long journey as an actor, and the overwhelming success of his Netflix series ‘Teach You a Lesson.’
Kim Mu-yeol is currently drawing global attention for his role as Supervisor Na Hwa-jin in the hit Netflix drama, which has quickly become one of the most talked-about Korean series of the year.
‘Teach You a Lesson’ Becomes a Global Netflix Hit
Based on a popular webtoon, ‘Teach You a Lesson’ follows a special agency created to protect teachers and restore order in schools affected by violence, difficult parents, and out-of-control students.
The series became a major global success shortly after its release. Within one week, it reportedly reached No. 1 in 45 countries and entered the Top 10 in 90 countries.
Kim Mu-yeol appeared on ‘You Quiz on the Block’ wearing the all-black suit associated with his character Na Hwa-jin, immediately drawing attention from viewers.
He shared that the drama’s success changed his public visibility almost overnight. According to the actor, his social media following increased by more than 1 million after the series was released.
He also laughed about online reactions comparing him to WWE star John Cena, while expressing gratitude after veteran actress Kim Hye-soo gave him a public shout-out.
Kim Mu-yeol Reveals His Painful Early Years
Behind his current success, Kim Mu-yeol revealed a much harder past.
The actor shared that during his early days as an unknown performer, his annual income was only about 200,000 won, or roughly $150. His story brought a serious mood to the studio as he described the financial difficulties his family faced when he was young.
Kim recalled debt collectors visiting his home and placing red warning stickers on household items. Eventually, his family had to move into a small, rundown shack in a poor hillside neighborhood.
To survive, he worked many different part-time jobs while continuing to hold on to his dream of becoming an actor.

Friendship With Heo Nam-jun Adds a Lighter Moment
The episode also included a more playful side of Kim Mu-yeol.
He spoke about his friendship with fellow actor Heo Nam-jun, who also recently appeared on ‘You Quiz on the Block.’ Kim revealed that the two have a close relationship and often compete intensely during daily workouts at the gym.
The story added humor to the episode and showed another side of Kim’s personality beyond his serious action-star image.
One of the most emotional moments came when Kim Mu-yeol’s wife, actress Yoon Seung-ah, appeared on the show.
The couple married in April 2015 and welcomed their first son in 2023. During the episode, Yoon spoke about standing beside Kim through his most difficult years and supporting him when his acting career was still uncertain.
Her appearance gave the interview a more personal and heartfelt tone, showing the long relationship behind Kim’s current success.
The Moment They Cried Over Netflix Success
Kim Mu-yeol and Yoon Seung-ah became emotional while recalling the moment they found out ‘Teach You a Lesson’ had reached No. 1 on Netflix’s global charts.
The couple said they looked at each other, embraced, and cried after realizing how far Kim had come from his early struggles.
For them, the achievement was not just a career milestone. It was a reminder of years of hardship, patience, and belief.
The contrast between Kim’s past poverty and his present global recognition made the moment especially moving for viewers.

Kim Mu-yeol’s Rise Becomes a Story of Persistence
Kim Mu-yeol’s appearance on ‘You Quiz on the Block’ showed why his success is connecting so deeply with audiences.
His journey from living in a hillside shack and earning almost nothing as an unknown actor to leading a global Netflix hit has become a story of resilience.
With ‘Teach You a Lesson’ expanding his international profile, Kim Mu-yeol is now being recognized not only as a strong performer, but also as an actor whose career reflects persistence, loyalty, and long-term dedication.
For viewers, his story offered more than a behind-the-scenes look at a popular drama. It became a reminder that some of the most powerful success stories are built slowly, through years of struggle that the public never sees.