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.
씨발 (ssi-bal) is one of the strongest swear words in Korean, roughly equivalent to the f-word in English. Hearing it burst out of Park Yeon-jin here shows just how completely her composure has shattered — this is a woman who normally controls every syllable she speaks.
Ha Yeong-jun explains that burying something on a rainy day is tactically smarter because rainwater washes soil around and contaminates forensic evidence. This reflects real concerns Korean investigators have with outdoor crime scenes during the monsoon season (장마, jangma), when heavy rains are common.
Dong-eun tells Ha Do-yeong she wants him to be Yeon-jin's '폐허' (pye-heo), meaning 'ruins' or 'wreckage,' rather than her '영광' (yeong-gwang), meaning 'glory' or 'crowning jewel.' The contrast is pointed: glory lifts someone up, ruins mark where something once stood. Dong-eun isn't just asking him to leave — she wants his presence itself to become a scar.
Yeo-jeong carefully works on Dong-eun's burn scars, explaining that healing a scar requires cutting into it so fresh tissue can grow back. Burn scar revision is a real procedure in Korea; the fact that Dong-eun has lived with untreated scars for decades underlines how thoroughly the bullying stripped her of access to normal care and self-worth.
Seon-a calls Dong-eun '쌤' (ssaem), a warm, informal contraction of 선생님 (seonsaengnim, 'teacher'). Korean students use it affectionately for a teacher they feel close to, much the way an English speaker might say 'teach.' From a student who has barely been allowed to trust anyone, the word carries a lot of weight.
Hye-jeong's whole plan hinges on a Korean car-culture habit: passengers routinely leave belongings in the back-seat pocket, and the driver retrieves them. By calling Jae-jun on speakerphone before handing the tablet over, she makes sure the driver hears everything — a small, clever manipulation that shows how she gathers information.
Dong-eun asks Seong-hui whether she still knows the 'guys with tattoos on their bodies' — a discreet way of referring to men with connections to the criminal underworld. In Korea, full-body or visible tattoos have long been associated with조폭 (jopok), organized crime gangs, though that image is slowly changing among younger Koreans. Asking for their 'help' here means muscle, not ink.
Hyeon-nam reads aloud a letter she wrote to Seon-a's overseas homestay guardian, 'Laura Wilson.' Sending a handwritten or heartfelt letter to a host family is a common Korean custom when a child studies abroad — parents express gratitude and share their child's personality, allergies, and habits so the host can care for them like their own.
Yeo-jeong has just purchased a shuttered 장례식장 (jangnye sikjang), a funeral home. In Korea, funeral homes carry strong social stigma — neighbors avoid living near them, making such properties hard to sell and therefore cheap. The agent's puzzled question ('why buy this?') reflects that stigma. For Yeo-jeong, the building is a means to an end rather than a morbid choice.
Yeon-jin's mother recalls a 보살 (bosal) — a lower-ranking female shaman or fortune-teller — warning her to avoid people whose names contain the consonant 이응 (ㅇ, the nasal ng-sound). Korean folk belief holds that certain sounds in a name carry bad 살 (sal), a kind of malign spiritual energy that can bring misfortune to those around the person. It is a very specific, real superstition still whispered about today.
너울 (neoul) refers to a long ocean swell — a wave generated far out at sea that travels silently, with no white caps, until it suddenly crashes ashore with enormous force. Korean coastal safety broadcasts regularly warn about 너울 because it is nearly impossible to predict and has killed people standing on breakwaters on otherwise calm-looking days. Dong-eun has used this word as her metaphor for herself: quiet on the surface, devastating on impact.
Yeo-jeong compares himself to a 망나니 (mangnani), the name for the professional executioner in Joseon-era Korea who carried out beheadings by royal decree. A 망나니 did not ask why the condemned deserved death — he simply swung the blade. Yeo-jeong is saying he has chosen to be Dong-eun's instrument without asking for justification, a darkly romantic way to frame his loyalty.