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.
미역국 (miyeokguk) is a soup made from dried seaweed that Koreans traditionally eat on their birthdays. The custom comes from the fact that mothers drink miyeokguk after giving birth — seaweed is rich in iodine and calcium — so eating it on your birthday is a way of remembering and honouring your mother. Hye-jin is making it from scratch to mark Du-sik's first birthday as a couple.
내돈내산 (nae-don-nae-san) is a popular Korean internet phrase meaning 'bought with my own money' — a shorthand guarantee that a review or recommendation is unpaid and genuine. Mi-seon is using it sarcastically, telling Hye-jin to just buy the soup herself instead of cooking it badly.
귀빠진 날 (gwi-ppajin nal) literally means 'the day your ears came out' — a colloquial, affectionate way of referring to a birthday, picturing the moment a baby's head emerges during birth. It's the kind of warm, folksy phrasing older Koreans often use, and Hwa-jeong uses it here to argue that Du-sik's birthday absolutely deserves a fuss.
The grandmothers are enthusiastically calling out fancy café drinks by name — 에스프레소연유라테 (espresso condensed-milk latte), 벨지안소꼴라모까 (Belgian chocolate mocha), and 샤케라또 (shakerato, an Italian iced espresso). Speciality coffee culture spread rapidly across Korea in the 2010s, and even small seaside villages now have stylish cafés, so these grandmothers have developed surprisingly specific preferences.
서목태 (seomok-tae), also called 쥐눈이콩 (jwinuni-kong, 'rat-eye bean'), is a small black soybean long used in Korean herbal medicine. It is believed to improve blood circulation, relieve stiffness, and help with numbness or paralysis — which is why Do-ha has been brewing it for his father who cannot use his lower body. Du-sik's herb shelf is stocked with the real ingredients of traditional 한의학 (hanuihak, Korean medicine).
복날 (bok-nal) refers to three sweltering midsummer days on the lunar calendar — 초복, 중복, and 말복 — when Koreans traditionally eat hot, protein-rich foods to replenish energy lost to the heat. Samgyetang (ginseng chicken soup) is the most iconic bok-nal dish. Seong-hyeon is embarrassed that he, as Do-ha's senior, forgot to treat him on this important culinary occasion — and Du-sik stepped in instead.
In South Korea, golf has long been associated with wealthy urban professionals — it is expensive, access to courses is limited, and playing it signals a certain social class. Hye-jin's Seoul dental-school friends suggesting a casual round is completely natural in their world, but she worries the sport will create an awkward gap with Du-sik, whose life in Gongjin is deliberately outside that status game.
욜로 (yolo) entered Korean mainstream culture in the mid-2010s carrying the same 'You Only Live Once' meaning as in English, but it quickly took on a specific local shade — describing people who quit stable jobs, leave Seoul, and prioritise personal fulfilment over career ladders. Hye-jin's friends use it as a convenient label for Du-sik's lifestyle, though his philosophy is noticeably more grounded than the trend they have in mind.
당근이죠 (danggeun-ijyo) is a popular Korean slang phrase meaning 'of course!' — a playful twist on 당연하죠 ('naturally'). 당근 also literally means 'carrot,' so the phrase conjures an image of a carrot for comic effect. It is the kind of cheerful, slightly childish slang that suits Bora's character perfectly.
할머니 Gam-ri is recalling 태풍 사라호 (Typhoon Sarah, 1959), one of the most devastating storms ever to hit the Korean Peninsula. It killed nearly 850 people and left hundreds of thousands homeless — still a reference point for the oldest generation when measuring how bad a storm really is. Her casual comparison is both comic and a quiet reminder of how much hardship her generation lived through.
라마즈 호흡법 (Lamaze breathing) is widely taught in Korean prenatal classes, and expectant mothers are generally expected to know the technique. The classic Korean version uses the rhythm 흠-흠-후 (two nasal inhales, one exhaled breath) to manage contractions. Hye-jin coaching Yun-gyeong through it — despite being a dentist, not an obstetrician — shows both her medical composure and how universal the method is in Korea.
밥풀이 (bap-puri) means 'little grain of rice' — a sweet, homespun nickname Yun-gyeong and Geum-cheol have been using throughout the pregnancy for their unborn baby. It reflects the Korean custom of giving an affectionate prenatal name (태명, taemyeong) to a foetus, which the family uses right up to and sometimes after birth.
우리 (uri) means 'we' or 'our,' but in Korean it carries a deeper warmth than its English equivalent — Koreans say 우리 집 ('our house') and 우리 엄마 ('our mother') even when talking about their own. Hye-jin's longing to become 우리 with Du-sik is not just about romance; it is about being included in his inner world. His five years of silence form the emotional wall between them and the unresolved tension driving the episode's final act.