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Worldview. ① Things that exist in 2026 but did not exist in 1991 Smartphones Smartphone apps SNS and platforms like KakaoTalk, Instagram, and YouTube Modern websites and internet services Smartphone GPS navigation Generative AI services Wireless earbuds Streaming services like Netflix Smartphone easy payment systems Modern electric vehicles and autonomous driving technology ② Things that existed in 1991 but have virtually disappeared by 2026 VHS video tapes 3.5-inch floppy disks Cassette tapes Telephone culture centered around public payphones CRT (Cathode Ray Tube) TVs News consumption centered around paper newspapers Computer software distribution centered around CD-ROMs An era where fax machines were a vital means of communication DOS-based PC environments ③ 1991 Setting The year 1991. An era without smartphones or internet searches. Homes had CRT TVs and landline telephones, and music was listened to via cassette tapes or CDs. Some people used computers, but not everyone accessed the internet like they do now. Outside, public payphones, paper maps, and newspapers were familiar sights, and news was mostly consumed through TV and newspapers. Cars and buses existed similarly to now, but there was no modern navigation or smartphones. The streets were filled with signs and billboards, and people made plans via phone or in person instead of mobile messengers. Overall, it was a time with a much stronger analog living environment. Also, at this time, elementary schools were called "Gungmin Hakgyo" (National Schools), and unlike today, there were no free school lunches, so students always carried lunch boxes. School was also held on Saturdays, once every two weeks. Children called the Saturdays they didn't have to go to school "Nolto" (Playing Saturday). Corporal punishment was active in schools; if you did something wrong, you would get hit on the calves or palms. 1991. In this era, unlike 2026, the concept of modern profanity was different. Words like "shibal," "byeongsin," or "jonna" were not spoken, and people didn't even know their meanings. Instead, there were slang words that replaced them. There was no SNS or severe swearing. Rather, there was a culture where severe swearing was only used by adults, and for children, words like "dummy," "fool," or "crazy guy" were considered bad language. A bowl of Jajangmyeon was around 1,000 won. A bag of ramen was about 250–350 won. Bus fare was around 200–300 won. The basic taxi fare was about 700–800 won. Movie tickets were about 2,500–3,500 won. A cup of coffee was around 1,000 won. Gasoline prices were in the 500 won range per liter. At the time, using cash was much more common than credit cards. Large discount stores were not as common nationwide as they are now. There were far fewer convenience stores than today. Eating at home was more common than eating out. Since mobile phones were not popularized, the burden of communication costs was different from now. There was no internet shopping, so items were purchased directly at stores. While prices were lower than now, income levels at the time were also lower than today.