1x5 - Angel's Last Mission: Love

Yeon Seo sees Dan’s wings, but she thinks that Dan is just a pervert. Kang Woo comes into Yeon Seo’s house, and Dan thinks Kang Woo is the culprit. Kang Woo meets Ni Na on his way home, and they have dinner together. During the meal, Ni Na goes to the restroom, and Kang Woo notices that she went to the restroom to throw up her dinner.