12 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.
사주 (saju) is a traditional Korean fortune-telling system based on the year, month, day, and hour of a person's birth — the 'four pillars.' Knowing someone's saju is seen as unlocking the blueprint of their fate. It's still widely consulted today, from job interviews to marriage matchmaking, so the idea of feeding your saju into a wish-granting app feels both absurd and weirdly plausible to a Korean viewer.
Noise between floors is one of the biggest sources of conflict in Korean apartment living — so much so that there are official mediation services and even police call-outs for it. The phrase 아랫집 (araetjip, 'the household below') is immediately understood as a loaded term: running or jumping upstairs is considered genuinely rude, not just mildly annoying.
In South Korea, huge apartment complexes called 아파트 단지 (apateu danji) house thousands of families, and growing up in the same 동 (dong — a numbered building within the complex) as a classmate is totally normal. It creates a specific kind of closeness: you commute together, your parents know each other, and the line between neighbour and best friend blurs completely.
갑분싸 (gapbunssa) is a popular abbreviation of 갑자기 분위기 싸해짐 — 'the atmosphere suddenly got awkward/icy.' It's the Korean equivalent of 'well, this just got weird.' 오타쿠 (otaku) is borrowed from Japanese and is used in Korean teen slang for someone obsessively into anime, games, or niche fandoms — here it's thrown as a light insult.
형욱 presents 기리고야 (Girigoya) as a mysterious app that grants wishes in exchange for your recorded saju and a sincere spoken desire. The name doesn't correspond to a real Korean word, giving it an eerie, unknowable quality — the kind of name that sounds like it was found somewhere it shouldn't have been.
생파 is short for 생일 파티 (birthday party). Among Korean teens it specifically means a friend-organised celebration — cake, decorations, and a surprise element — rather than a family dinner. Nari calling it 쪽팔리게 ('embarrassing') reflects a common teenage attitude: being openly celebrated by friends feels childish, even though everyone secretly wants it.
형욱 says 다이조부 (daijoubu), the Japanese word for 'it's okay / no problem.' Korean teenagers — especially those into anime or Japanese pop culture — drop Japanese phrases casually the way English speakers might throw in French. It marks him as the group's 오타쿠 type without him needing to say a word about his interests.
The coach warns that 건우 is heading toward 입스 (ipseu) — the Korean transliteration of 'the yips,' the sports psychology term for a sudden, anxiety-driven inability to perform a skill you've mastered. In Korean athletics it's taken very seriously. A track-and-field athlete getting the yips on the runway — unable to commit to the jump — is a genuine career threat.
상비군 (sangbigun) literally means 'standing reserve army,' but in Korean sports it refers to the national team's training squad — athletes on call to be promoted to the full 국가대표 (national representative) squad. Getting a 상비군 call-up as a high schooler is a very big deal and can lead directly to a spot on the Olympic team.
야자 is short for 야간 자율학습 (night voluntary self-study) — the mandatory after-school study sessions that run until 9 or 10 p.m. in many Korean high schools. Despite the word '자율' (voluntary), attendance is often compulsory. Students are supposed to study silently, so getting caught watching something on your phone during야자 is a real infraction.
형욱 has grabbed a knife and his classmates are begging him to put it down and not hurt himself. This is a self-harm/suicide threat scene. If you or someone you know is struggling, please reach out: in Korea call 자살예방상담전화 1393 (24 hrs); international viewers can contact their local crisis line.
형욱 cries out 살려 줘 (sallyeo jwo) — literally 'let me live / save me.' In Korean the phrase carries extreme desperation; it's not hyperbole. The shift from aggression to this plea in the same scene is meant to show that his rage and his terror are the same feeling turned different directions, and his friends are only just beginning to understand how serious his pain is.