Okay so I am always the first to raise questions when something is even a bit pedo, but in this case I don’t think it is? I might be wrong, but like from what I gathered, Hyo-un is a dragon who is old af but took the form of a child because that’s what he came across first.. he is NOT actually a child.
Secondly, i don’t think they are any romantic feeling from the side of Tae at all.. so I don’t know this hasn’t raised any warning bells in my head yet ╮( ̄▽ ̄)╭