On June 16, Netflix Korea uploaded a video titled “Teach a Lesson at Graduate Gathering: The Bad Guys Read Comments, Q&A, and Behind-the-Scenes Stories.” The video featured cast members Jang Yo-hoon, Ok Jin-wook, Yoo Tae-joo, Park Seo-yoon, and Park Ji-yeon, reflecting on their experiences filming the series while reacting to fans’ comments.
In Teach You a Lesson, Jang Yo-hoon gave a memorable performance as a minor involved in a series of serious crimes. His character participated in vehicle thefts, drove without a license, vandalized public property and was even involved in drug distribution. His convincing performance made many viewers believe that he perfectly embodied the troubled teenager he played on screen.
However, the actor’s real life story couldn’t be more different. At 33, Jang Yo-hoon has earned praise not only for his acting talent but also for his academic achievements, leading many Korean netizens to label him as “eomchinah,” a Korean term that refers to someone who excels in almost every aspect of life.
Jang Yo-hoon graduated from Hyundai Chungun High School, one of the most renowned academic institutions in South Korea. He later enrolled in Sungkyunkwan University, one of the most prestigious universities in the country. However, after completing his first year, he made the courageous decision to leave and pursue his passion for acting. The actor subsequently entered the Korea National University of Arts, where he studied at the Acting Department and focused on building his career in performance. The revelation surprised many fans who had only recently discovered it through Teach You a Lesson.
Following the disclosure of Jang Yo-hoon’s educational background, online communities quickly filled with reactions from impressed viewers. Some comments included:
- His acting was so realistic that learning that he attended Sungkyunkwan University is even more shocking.
- It is the definition of “eomchinah”.
- His performance in this drama was incredible. I hope to see more of his great performances in future projects.
- His character was one of the worst people in the series, but his personality in real life seems completely different and charming.

The contrast between his intimidating screen presence and his accomplished academic history has only increased public interest in the emerging actor.
Jang Yo-hoon’s growing popularity comes as Teach You a Lesson continues to dominate Netflix charts around the world. The series follows the activities of a fictional Teachers’ Rights Protection Bureau, an organization created to restore authority and order in South Korea’s troubled education system. The series tackles issues involving restless students, troubled parents, and challenges faced by educators, offering what many viewers describe as a satisfying and cathartic form of justice.

After premiering on June 5, Teach You a Lesson topped Netflix’s global chart in just three days and maintained its No. 1 ranking. 1 for two consecutive weeks. The series also ranked first in 46 countries, including South Korea, Japan and Brazil, securing a place in the Top 10 charts in 91 countries around the world.
While many actors are praised for playing heroes, Jang Yo-hoon has attracted attention for doing the opposite, bringing a deeply disturbing villain to life with remarkable authenticity. Now, fans are discovering that behind the convincing performance is an actor with an impressive academic record and a dedicated commitment to his craft, making him one of the emerging stars to watch following the success of Teach You a Lesson.
Sources: Daum | MHN Sports

