47-year-old Jun Hyun-moo sighed under the pressure of marriage.

In the 5th episode of the quiz show 'Brain Academy' airing on Channel A tonight at 10 p.m., 'Legendary Korean History Teacher' Choi Tae-sung will appear as a master in the 'History' field, presenting quizzes to the 'Brains' Jun Hyun-moo, Ha Seok-jin, Lee Sang-yeob, Yoon Sohui, Hwang Je-seong, and Gweido in an exciting scene.

On that day, Choi Tae-sung will discuss King Seongjong, the 9th king of the Joseon Dynasty, as he enters the quiz show. He began by saying, "Seongjong completed the Gyeongguk Daejeon, the official legal code of Joseon," and explained, "At that time, marriage issues were also codified by law. If one couldn't marry, it was a national concern," making the 'unmarried' Jun Hyun-moo, Ha Seok-jin, and Yoon Sohui flinch. In particular, Jun Hyun-moo frowned and sighed, "Ah, concern," while Ha Seok-jin blamed himself, saying, "I was creating a concern." Later, Choi Tae-sung introduced that there were also laws for slaves in the Gyeongguk Daejeon, and he provocatively stated, "You all are indeed lower-class people!" This led the 'Brains' to ask, "What do you mean?" as curiosity arose about why Choi Tae-sung made the 'lower-class' remark.

Amidst the laughter, the discussion shifted towards the 'worst tyrant of Joseon,' King Yeonsangun, heightening the atmosphere. Choi Tae-sung noted, "When Yeonsangun ascended the throne, Joseon faced a tremendous crisis. Looking at the Annals of the Joseon Dynasty, it reveals extraordinarily cruel terror politics that make one wonder, 'Is this even possible?'" as he unveiled the horrific tortures actually conducted by Yeonsangun. He then unexpectedly posed a quiz, prompting Jun Hyun-moo to react, "I know the answer but don't want to say it," while Hwang Je-seong questioned, "This is correct history, right?" looking puzzled.

While interest is focused on what the quiz and its answer are that left everyone frozen, whether the 'Brains' will succeed in obtaining a 'knowledge medal' in the 'History' field can be confirmed in the 5th episode of the quiz show 'Brain Academy,' airing tonight at 10 p.m.

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