10 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.
The radio call reporting an unidentified body uses crisp military-style Korean dispatch language — short, repeated phrases with a command to respond (출동, chul-dong, meaning 'mobilise'). Korean police and emergency services use this clipped radio protocol the same way Western forces do, and dramas treat it as an instant signal that something serious has just been found.
혜정 ends her warning to 연진 with '좆 됐어' (jot dwaesseo) — a vulgar expression built around a crude word for male genitalia, used to mean 'you're totally screwed.' In Korean slang it functions like 'you're f***ed' in English: harsh, deliberate, and meant to land like a slap.
동은's mother boasts to the doctor that her daughter is a '선생' (seonsaeng — teacher). In Korea, schoolteachers hold a traditionally high social standing rooted in Confucian respect for education, and a parent loudly claiming a teacher child to a medical professional is performing both pride and social rank at the same time.
동은 has her mother committed by invoking her status as the sole blood relative (핏줄, pit-jul). Under Korean mental-health law, a direct family guardian can consent to inpatient admission when a patient is deemed a danger to themselves or others — which is exactly what the fire 동은's mother started triggered. The mother's fury is real: she understands she has lost control to her own daughter.
The landlady calls 여정's unit a '월세방' (wol-se-bang) — a monthly-rent room, as opposed to the more famous 전세 deposit system. Monthly rent rooms are common for single occupants and are often seen as the more modest, less financially secure option, which is why the landlady's teasing about expensive wallpaper styles lands as affectionate snobbery.
사라 warns 연진 that she is no longer a '초범' (chobeom — first-time offender). In Korea's sentencing guidelines, a clean record is one of the biggest factors a judge weighs toward leniency or a suspended sentence. Losing that status is a concrete legal threat, not just a moral one.
재준 hints that an expensive bottle of whisky that was once on the shelf at the bar is now missing — implying 연진 used it to kill 손명오. High-end Scotch or Japanese whisky bottles are status objects in Korean business and nightlife culture, displayed precisely because of their weight and cost, which makes the irony of the missing bottle particularly pointed.
The woman who calls 석재 describes herself as running an errand for '평창동 사모님' (the mistress of a Pyeongchang-dong household — a wealthy Seoul neighbourhood). She is a 무당 (mu-dang), a female Korean shaman who performs 굿 (gut) rituals for clients. Wealthy families quietly consulting a 무당 for luck, protection, or spiritual intervention is a running thread in the drama and reflects real, widespread private practice across Korean social classes.
여정 reveals she owns the building — which doubles as a 무당's workspace and, earlier in the series, a dermatology clinic. In Korea, mixed-use buildings where a medical practice occupies one floor and unrelated businesses occupy others are extremely common, especially in older urban neighbourhoods. The reveal reframes every previous scene set here: 여정 has had eyes on this location the whole time.
어린 연진 sneers that 소희should know her 'TPO' — Time, Place, Occasion. The acronym is borrowed directly into Korean youth and fashion culture and is used to police whether someone's clothing or behaviour is appropriately matched to the situation. Using it while forcing a classmate to strip is 연진 at her most chilling: performing etiquette as a weapon of humiliation.