9 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.
구정 (Gujong) is the lunar New Year, also called 설날 (Seollal), Korea's biggest family holiday. Extended families gather, and older relatives routinely ask younger couples when they will have a baby. The father-in-law's nagging about children at the holiday gathering is one of the most stereotyped — and genuinely dreaded — seasonal traditions in Korean family life.
The song being performed is '그대에게' (To You) by 무한궤도 (Muhangwedo), a beloved 1988 rock ballad. It is famous partly because its lead vocalist was a very young Shin Hae-chul, who became one of Korea's most iconic rock musicians. Using it here ties the college scenes to the exact era the main characters travelled back to.
모든 건강한 한국 남성은 약 18–21개월의 의무 병역을 이행해야 합니다. The friends coin the playful term 예민군 (yemin-gun), a pun on 예비군 (reserve forces), meaning 'the hyper-sensitive pre-enlistment period.' The stages they rattle off — denial, anger, bargaining, depression, acceptance — mirror the grief cycle, and the joke lands because every Korean man has lived it.
A friend hands Ban-do a gold necklace with a teasing remark that soldiers should not wear gold. There is a folk belief, and a practical military-base rule, that flashy jewellery is inappropriate for enlisted life. Giving or removing a gold necklace before enlistment is a small but recognisable farewell ritual among Korean friend groups.
The list shown on screen — going to a 나이트 (nightclub), visiting a bathhouse with her mother, karaoke with her mother, drinking with her mother — reveals that Jin-ju's wishes are not adventures but ordinary moments most Koreans take for granted. The final item, 엄마와 이별하기 ('saying goodbye to Mum'), is written as though parting itself is a privilege she must earn.
'진짜 사나이' (Jinjja Sanai / Real Man) is a classic Korean military march played at enlistment ceremonies and barbershops near army bases. Hearing it at the head-shaving scene is both official ritual and dark comedy — the army's bravado anthem underscoring how unglamorous the buzz-cut actually feels.
'입영열차 안에서' (On the Enlistment Train) by Kim Min-woo is THE quintessential Korean song about leaving for military service. Released in 1990, it describes the mix of dread and longing felt on the train to the base. Playing it during the head-shaving scene is both deeply sincere and gently ironic — a generational touchstone every Korean man recognises instantly.
삼대 독자 (samdae dokja) literally means 'the sole male heir across three generations.' In Korean family culture, continuing the family line has historically been tied to having a son, and being the sole heir in a lineage carries enormous family pressure. Jae-woo's status explains why Bo-reum felt she could not tell him about her infertility — she believed she was standing in the way of his duty to his family.
합의이혼 (habui-ihon) is South Korea's agreed divorce procedure: both spouses submit paperwork to a family court, wait through a mandatory 'reflection period' (one to three months depending on whether children are involved), and then register the divorce at a local district office (구청). The court's reminder call — that the paperwork expires if not finalised at the 구청 — is exactly how the system works, and the couple's non-reaction to the call says everything without a word of dialogue.