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, and Koreans traditionally eat it on their birthday. The custom comes from the belief that nursing mothers ate 미역 to recover after childbirth, so the soup is meant to honour the labour your mother went through to bring you into the world. Hye-jin is attempting to cook it herself as a first-birthday gesture for Du-sik now that they are a couple.
똥손 (ddong-son) literally means 'poop hands' and is a popular Korean slang term for someone who is clumsy or hopeless at anything that requires a delicate touch — cooking, crafting, drawing, you name it. Mi-seon is gently (well, not that gently) calling Hye-jin a kitchen disaster.
귀빠진 날 (gwi-bbajin nal) — literally 'the day your ears popped out' — is an affectionate, slightly comic Korean phrase for one's birthday. It refers to the moment a baby's head fully emerges during birth. Hwa-jeong uses it here as a playful way of saying birthdays are worth celebrating properly.
서목태 (seomok-tae), also called 쥐눈이콩 ('rat-eye beans'), are tiny black soybeans used in traditional Korean herbal medicine. They are believed to improve blood circulation, break up 어혈 (stagnant blood), and help with numbness or paralysis — which is exactly why Do-ha has been brewing them for his father who cannot use his lower body. Finding them in Du-sik's home signals how seriously Du-sik takes folk remedies.
Du-sik serves 백숙 (baeksuk), a whole chicken simmered plain in water with garlic and glutinous rice — essentially the unflavoured base of the more famous 삼계탕 (samgyetang), which adds ginseng, jujubes, and chestnuts. Both are eaten on the three hottest days of the lunar calendar, called 복날 (Boknal), as a way of restoring energy lost to summer heat. Du-sik jokes he ranks in the top three for this dish in Gongjin.
복날 (Boknal) refers to three specific sweltering days in the lunar calendar — 초복, 중복, and 말복 — spread across July and August. It is deeply ingrained Korean culture to eat hot, protein-rich food on these days, especially chicken soup, to fight the heat with heat and replenish stamina. Seong-hyeon's embarrassment at not having treated Do-ha on 복날 is a real social obligation, not just politeness.
Golf in Korea carries strong associations with wealth and professional status; it is expensive, requires club membership or pricey green fees, and is a common networking activity among high-earning professionals. Hye-jin's colleagues from Seoul assume that someone without a steady corporate job would not know how to play, which is exactly the 'frog in a well' thinking Du-sik says he wants to challenge.
욜로 (YOLO — 'You Only Live Once') became a buzzword in South Korea around the mid-2010s, used to describe people who prioritise present enjoyment and personal experience over saving, career advancement, or social expectations. Hye-jin's friend uses it as a quick label to make sense of Du-sik's unconventional lifestyle, and Du-sik gently reframes the idea in his own terms.
월반 (wolban) means skipping ahead a school grade, reserved for exceptionally fast learners. Mi-seon uses it as a teasing compliment — Eun-cheol learned one thing and immediately figured out two, so he is advancing faster than expected. It is a warm, slightly playful way of saying he is a quick study in the art of dating.
The grandmothers are comparing the current storm to two notorious typhoons. 루사 (Rusa, 2002) caused catastrophic flooding across South Korea, killing over 200 people and causing billions in damage — still one of the costliest disasters in Korean history. 사라호 (Sarah, 1959) was even more deadly, killing roughly 850 people; for the older generation it remains the benchmark of a truly terrifying storm. Their casual comparison captures how differently the elderly and younger residents read the same weather.
라마즈 호흡법 (Lamaze hoheupbeop) is the Lamaze technique taught widely in Korean prenatal classes: rhythmic breathing patterns — short nasal inhales followed by a mouth exhale — used to manage pain and focus during contractions. Hye-jin walking Yun-gyeong through it signals she is drawing on her medical school training even though obstetrics is far outside her specialty as a dentist.
Male-pattern baldness (탈모, talmo) is a surprisingly frequent topic in Korean popular culture — there are dedicated online communities, clinics, and even a running joke that stress causes it. Geum-cheol bringing up the family 탈모 유전자 (hair-loss gene) mid-labour, as a desperate attempt to get Yun-gyeong to push instead of squeeze his hand, is pure Korean situational comedy built on this well-known cultural anxiety.
At Korean barbecue, 콩가루 (konggaru) — roasted soybean powder — is mixed with salt and sometimes sesame oil as a dipping seasoning, especially for grilled pork belly (삼겹살). Boasting that she has prepared it for Bora shows Du-sik knows exactly what the children want; Bora's delight at the detail is a small, accurate portrait of how seriously Koreans of all ages treat the BBQ side-dish ritual.