While the series is often discussed on fan sites, you can watch the first episode with English subtitles on these authorized streaming services:
After she wakes, the two spend a magical evening together—drinking beer, dancing at a salsa club, and walking barefoot through the city. (Dramacool-SUB) Encounter Episode 1
Offers free viewing (with ads) or premium access. While the series is often discussed on fan
Available in various regions with a monthly subscription. dancing at a salsa club
Drowsy from a sleeping pill she took earlier, she nearly falls from a high ledge, but Jin-hyuk catches her and lets her sleep on his shoulder.