I'm kinda mad at Myungdo for doing it with someone else, but I also know that they not dating or anything. And Myungdo doesn't even know his own feelings, so how do we expect he know someone else feeling? He maybe doesn't know that what he doing might hurt Cheongak feelings.
Last reading: Ch.45
Myungdo might be nervous since that's was his first time coming to Cheongak house.
Red Area