I'm almost sure that chanwoo didn't identify him from the face, because if you noticed, on the screen where they were watching the stream, his face was very blurred, so I think no one recognized him and chanwoo guessed it was dg because in the previous chapters he told him everything about his relationship with alex, so he must have connected the dots (at least I think so)
Actually Chanwoo recognize him mostly because of his voice
Dang. DG why I wanted you to have the sexiest, hottest, and loving guy not Alex. Now look at the mess you created
Right, I didn't think about it xD but if nobody saw the face, I think having heard the voice is not a big deal
So, has anyone ever had their mom say I TOLD YOU SO? Well guess what people I TOLD YOU SO. Now I feel a little bit satisfied. Just red the raws and spoiler alert, Alex beats DG, and MD, and C saw DG's face and was able to identify him immediately. Also DG's face was screen shot for people to see. So DG was it worth it, was Alex worth the doom that you have unleashed on yourself?