Not Even Fate Can Stop Me From Loving You

Wang Yeo and Kim Shin have been in a relationship for many years. Although fate says Eun Tak is Kim Shin's bride, he ignores as he is already in love with Wang Yeo, and keeps his discovery a secret. But on the night Wang Yeo decides to go out, he runs into the special case that has been haunting him for years and discovers the truth.

Based on that scene in the second episode.