On the KBS2 variety show 'Problem Child in the Rooftop Room,' Joo Woo-jae drew attention by showcasing talent rivaling that of a star instructor.

In episode 333, broadcast on the 10th, top math instructor Jung Seung-je and top Korean language instructor Yoo Dae-jong appeared ahead of the 2027 College Scholastic Ability Test, entertaining viewers with various quizzes and talk. During the broadcast, Joo Woo-jae, a graduate of Hongik University's College of Engineering, stood out by actively engaging with the two instructors.

Joo Woo-jae revealed that he regularly watches Jung Seung-je's lectures, saying, "You focus on making students understand principles rather than memorization, so your throne will never fall," expressing his respect for Jung Seung-je. When Kim Jong-kook teased him, saying, "There he goes again, acting like he knows everything," Joo Woo-jae shot back, "Don't I love math? People who love it know everything," drawing laughter.

That day, Yoo Dae-jong explained that recently, fifth-generation star instructors tend to discover talents with both academic credentials and good looks through online lecture platforms and systematically train them like idol trainees. He then said, "Fifth-generation star instructors mostly look like Joo Woo-jae," and praised him, asking, "You must be really smart?" adding more laughter to the set.

Meanwhile, 'Problem Child in the Rooftop Room' airs every Tuesday at 8:30 p.m.