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.
In South Korea, some private medical clinics and hospitals offer 왕진 (왕진, house-call) services where a doctor or nurse visits a patient at home. Here a home-visit nurse has been assigned to watch over the bedridden patient around the clock — a premium arrangement that signals the family's resources and concern for keeping the illness out of the public eye.
Young Seon-u calls the older boy 형 (형), the Korean word a younger male uses to address or refer to an older male he is close to — a brother, cousin, or a friend who feels like family. It is a term of both affection and deference, and hearing it here underlines how much the younger boy looks up to him.
Jin-cheol says the witness's death looks like a staged suicide — 위장 자살 (위장 자살). In Korean crime dramas and real investigative journalism, suspiciously convenient 'accidents' or apparent suicides linked to powerful figures are a recurring and culturally resonant motif, reflecting public anxiety about cover-ups by the wealthy and well-connected.
처삼촌 (처삼촌) literally means the uncle on a wife's side — the brother of a wife's parent. Korean kinship terms are highly specific: once a couple marries, every relative gains a precise relational title. The friends point out that Seon-u isn't technically 처삼촌 yet because the wedding collapsed, so the title can't apply.
Eun-ju received a gift for acting as a 중매 (중매) go-between — someone who introduces and encourages a couple toward marriage. Giving the matchmaker a generous present, often clothing or a department-store gift set, is a well-established Korean custom. Because the wedding fell through, she genuinely worries etiquette requires her to return it.
먹튀 (먹튀) is a popular slang compound of 먹다 (to eat) and 튀다 (to bolt), describing someone who accepts something for free and then disappears without holding up their end. It started in sports to describe players who signed big contracts and underperformed, but ordinary Koreans now use it for any situation where someone takes and runs — here, Eun-ju jokes she is one because she kept the matchmaking gift after the wedding fell apart.
Major Korean broadcast networks are large campus-style buildings with dozens of CCTV cameras covering public corridors, lobbies, and production areas. Cheol-min's point is that whoever attacked Seon-u inside the building knew exactly which corridor had no camera — indicating an inside source or professional surveillance, not a random act.
In Korean corporate and media culture, submitting a 사직서 (사직서) — a formal written resignation — carries significant weight. It is a deliberate, face-to-face ritual: you hand the document to your direct superior, not HR. A senior figure rejecting or sitting on the letter for days, as the bureau chief does here, is a recognized way of pressuring someone to reconsider without openly refusing.
The drama's central device is a set of nine sticks of Himalayan incense that each send the user exactly 20 years into the past for 30 minutes. Every use shortens the user's present-day life. Min-yeong now knows the full backstory — that events she remembers from childhood were actually caused by a time-travelling Seon-u — which is why she says her memories finally make sense.
Seon-u teases Min-yeong by comparing her self-imposed midnight deadline to the Cinderella fairy tale, where the magic breaks at the stroke of twelve. The Cinderella story is universally familiar in Korea through Disney and domestic retellings, so the image of a countdown that turns a beloved moment back into ordinary life lands immediately and bittersweet.
Korean weddings traditionally feature a 주례 (주례), an officiant — often a respected elder, professor, or senior colleague rather than a religious minister — who delivers a speech and formally pronounces the couple married. Having the bureau chief lined up as officiant shows how close their professional relationship was, making Min-yeong's resignation all the more loaded.
노보리베쓰 (Noboribetsu) is a famous hot-spring (온천, oncheon) resort town in Hokkaido, Japan, a very popular short-haul getaway for Koreans — close enough for a quick flight, exotic enough to feel like an escape. Mentioning it instantly tells Korean viewers that someone fled the country to a recognizable leisure destination, not somewhere truly remote or untraceable.