Lee Seo-ah, a 22-year-old with a bright outgoing attitude, works at her mom's cafe during the day and runs a TXT fan account at night. [@Soobinny on Instagram: 1,000,000 Followers] Choi Soobin, the leader of TXT and a passionate latte lover, decides to try the famous dog cafe in Gangnam, South Korea. He looked unrecognizable with his black mask, a black bucket hat, and a fresh new pair of contacts. The two meet, but without a proper introduction, Lee Seo-ah has no real idea of who's behind the mask.