Career archive, June 2026. This profile follows Jin Ki-joo’s route into acting. It is separate from the changing Netflix rankings and renewal news for Teach You a Lesson.
Before her screen career, Jin studied computer engineering at Chung-Ang University and worked as an IT consultant at Samsung SDS. The Korea Herald’s June 23 profile traces the subsequent moves through local reporting and modeling, drawing on her recollections in television interviews.
Three career changes before acting
- Samsung SDS: she spent about three years with the company before leaving at 26.
- G1 Broadcasting: a trainee reporting job lasted about three months before she pursued entertainment.
- Modeling: the 2014 SBS Supermodel Contest helped her obtain acting representation.
These were successive jobs, not characters she played. Keeping that distinction clear matters when a headline compresses an engineering degree, a corporate position and a screen role into one story.
Screen credits beyond one Netflix hit
Her television debut came in Twenty Again in 2015. Later credits include Moon Lovers: Scarlet Heart Ryeo, Come and Hug Me and Homemade Love Story. The film Little Forest brought a Chunsa new-actress award; Uncle Samsik and Undercover High School preceded her inspector role in Teach You a Lesson.
For a viewer discovering her through the school-action series, that list provides a route beyond the latest chart headline: an earlier film credit, a political drama and another action-comedy are different points of comparison. It is a selection of credited work, not a claim that the performances are interchangeable or a guarantee of availability on a particular country’s streaming services.
Where the career account ends
The biographical account above comes from published reporting, not a new K-Cult interview. It does not establish why Netflix viewers chose the series, how many searched for Jin, or whether her casting caused its commercial success.
For the series itself, see the separate Teach You a Lesson guide to its premise, audience figures and teachers’ rights debate. This archive keeps the actor’s professional path distinct from that evolving release story.