She's the top one. Some people might know her since she's a Facebook star and also a model for underwear? She started off as an ulzzang with Ahreum Songyi. This girl also fits Gray's ideal type (pretty smile, straight teeth, short, professional woman)
I looked through Haneul's Instagram and I think that this person might be Gray. And if you read the comments, some people are speculating their relationship.
Comparison of the guy I think is Gray and the actual Gray.
And their hairstyle is also very similar..
I can see Gray in him
original post: here