I have already forgotten about all the other girls living in the room with them (forgot what they looked like) and only barely remembered that they moved in with him for various reasons. That being said the dancing around when they like each other can get a bit grating. Then again if they confessed the story would have a harder time justifying its existence. Not saying that we couldn't have some post couple shenanigans with the other girls but it would only be a matter of time before it gets even more boring.
Oh, and thanks for the chapter, it lives, yada yada.