...is really growing on me. 
to be honest I didn't really like the thought of them together at first
and it's really messing with my daelo/daejong-biased heart but...
just look at them, okay!? just look:

I like to see my baby happy, and he seems to be happy with
this yoo youngjae, so... I guess I like this. yes. I like this, I do. 
I shall refer to them as vocal couple.
because they're vocal (and not just on stage). >:3