The Substitute: Poster Reveals the Cast

Imagine the most stressful day of your school life, then add blackmail and a crime that can’t be undone. That’s the high-stakes premise behind The Substitute, an upcoming Korean crime thriller that has just unveiled its first character poster. The drama is set to premiere on November 23, and the setup is already sparking curiosity.

The Substitute: Overview

Detail	Info
Genre	Crime thriller
Premiere date	November 23, 2026
Young leads	Bae Hyeon Seong, Cha Kang Yoon, Park Yoon Ho
Veteran cast	Uhm Ji Won, Park Hyuk Kwon, Baek Ji Won
Core theme	College entrance exam pressure

The Premise: One Exam, One Secret, One Crime

The story follows three young men whose conflicting desires and personal struggles push them toward an irreversible crime on the day of the college entrance exam. At the center is a top-ranking student from a low-income family. He attends a prestigious private high school on a special scholarship, and a blackmailer who knows his secret forces him to take the exam on someone else’s behalf.

Meet the Three Young Leads

Actor	Character	Who They Are
Bae Hyeon Seong	Nam Jae Yeop	A seemingly perfect student with wealth, looks and top grades, but it’s all a facade
Cha Kang Yoon	Kang Geon Tae	A scholarship student from a low-income family who still ranks No. 1 at Junggyeong High School
Park Yoon Ho	Joo Hee Dong	A friend who sees Geon Tae as his pride and role model

The Parents Who Turn Up the Pressure

The adults in this drama are just as intense as the students. Here’s who’s who:

Uhm Ji Won as Ye Jun Mo: A mother who becomes more competitive than anyone when it comes to her son’s exams. For more on the actress, see the Wikipedia page on Uhm Ji-won.
Park Hyuk Kwon: Jae Yeop’s father, a strict man with plenty of social status and influence.
Baek Ji Won: Jae Yeop’s mother, an overzealous parent who never runs out of things to brag about.

Why This Story Feels Timely?

Entrance exam pressure is a real and deeply felt issue, and the drama uses it as a launchpad for suspense. The production team says the characters’ desires intertwine with the realistic subject of college entrance competition and spiral in unpredictable directions. That mix of everyday stress and criminal tension could make for a gripping watch.