13 timestamped notes explaining the Korean cultural context in this episode — customs, idioms, food, honorifics, and history, at the moment each appears on screen. These notes discuss events across the whole episode. To see them revealed scene-by-scene as you watch, use the episode page to find an airing.
약혼자 (yak-hon-ja) means a person you are formally engaged to marry — a step beyond dating but not yet a spouse. In Korea, engagements traditionally carry serious social weight, and the loss of a 약혼자 is treated almost as gravely as losing a spouse. This makes the emotional stakes of the accusation against Na Hwa-jin feel especially heavy to Korean viewers.
Asking 식사하셨습니까 (did you eat?) instead of 'how are you?' is a classic Korean way of showing care, especially from a junior to a senior. It literally asks whether the other person has had a meal, but functions as a warm, respectful greeting. Using it here signals that Im Han-rim treats Na Hwa-jin with genuine personal concern, not just workplace formality.
EBS (Educational Broadcasting System) is a government-run broadcaster that produces 인강 (in-gang), meaning internet lectures, specifically designed to help students prepare for the 수능 (su-neung), Korea's national college entrance exam. These are free or very cheap and are widely used across the country. Na Hwa-jin telling Cheon Sang-yeol that his EBS lectures helped him get into the Korea Military Academy is an enormous compliment — it means Cheon reached students far beyond his own classroom.
참을 인 is the Chinese character 忍, meaning 'to endure' or 'to bear.' A very common Korean saying goes '참을 인 자 셋이면 살인도 면한다' — write the character for endurance three times and you can avoid even murder. Koreans sometimes literally write or trace the character on their palm when trying to stay calm. Seeing it written on a wall here signals someone has been pushing themselves to hold their temper for a long time.
스카이 is the Korean shorthand for the country's three most prestigious universities: Seoul National University (서울대), Korea University (고려대), and Yonsei University (연세대) — the first letters spell SKY. Getting into any of them, especially with a scholarship, is the pinnacle of Korean academic achievement and is treated as a life-defining event. The comment that Park Hyeon-ung's grades would earn him a scholarship there underscores just how much he is throwing away.
등하굣길 combines 등교 (going to school) and 하교 (leaving school) into one word for the daily commute. It is mentioned so naturally because Korean students, especially high schoolers, spend enormous time on this commute — often using every spare minute to study. The fact that Cheon Sang-yeol picks up pebbles along this path so students won't trip while reading is the kind of quietly devoted act that earns someone the title 참스승 (true teacher).
미미미누 is a real and hugely popular Korean YouTuber known for educational and school-life content aimed at teenagers and young adults. Being invited to appear on a 미미미누 video is a mark of genuine cultural relevance among Korean youth. A teacher appearing on the channel would be a major deal to students, which is exactly why it's used here to show how beloved Cheon Sang-yeol has become.
순대 (soon-dae) is a beloved Korean street food made from pig intestines stuffed with glass noodles, vegetables, and sometimes blood. It is cheap, filling, and deeply associated with youth, pojangmacha (street stalls), and hanging out after school or studying late. The students eating it together while arguing over exam prep notes is a very familiar slice of Korean teenage life.
족보 literally means 'family genealogy register' — the book that records a clan's lineage. Among Korean students it is slang for collected past exam papers, leaked question trends, or insider study notes passed down from older students. Getting your hands on a good 족보 before exams is considered a serious competitive advantage, which is why the students are fighting over who gets it first.
Joan of Arc is used in Korean popular culture as a symbol of someone who throws themselves into a righteous cause at great personal cost — often with a slightly mocking edge, implying the person is being recklessly noble. Calling Im Han-rim 'Jeanne d'Arc' here is a taunt, suggesting she is playing the self-sacrificing hero on behalf of strangers when nobody asked her to.
Each of Korea's seventeen metropolitan and provincial regions has a 교육감 (gyo-yuk-gam), a directly elected superintendent who oversees all public schools in that region. The position is genuinely powerful — controlling teacher appointments, school budgets, and curriculum policy — and is fiercely contested in local elections. The political scheming around who will become the next Seoul 교육감 is therefore very real-stakes, not just a background detail.
The politician quotes Article 8 of the Education Rights Protection Bureau's founding law, which exempts its supervisors from ordinary legal restrictions. In Korean administrative law, a 설치법 (seol-chi-beop) is the specific statute that creates and defines a government body. Granting a body immunity from other laws is highly unusual and is what makes the Education Rights Protection Bureau constitutionally controversial within the show's world.
입시 비리 (ip-si bi-ri), corruption in university admissions, is one of the most sensitive social issues in South Korea. High-profile real-world scandals — involving forged extracurricular records, leaked exam answers, and elite parent networks — have shaken public trust in the education system. The public naming of the parents on live television hits a raw nerve because Korean audiences recognise exactly what kind of scandal this is and how many children's futures it distorts.