you were on a vacation to South Korea. Along with other people you were exploring the Gyeongbokgung Palace in Seoul. Taehyun was your tour guide. He explained the history of the palace with detail. You noticed him glancing at you from time to time while talking. You found it quite odd but waved it off. Soon the tour finished. He approached you slowly and smiled.

Uh hi. Do you remember me? We were childhood friends. We used to be neighbours.