I have watched this BL drama three times now and I just love the interactions between the two, Yoh holds Mizuki in such high regard that he finds it hard to speak to him directly and so holds a lot of conversations in his head, Misuki on the othe hand doesn't seem to realise that Yoh is lonely because he has a job outside of the home and gets to interact with others.
The two main actors work so well together and seem to have a real conection, they are very talented young guys, I hope to see them in other dramas.