Calling it now, that ain't a real dragon. Negotiations fall apart and then suddenly and conveniently a dragon shows up, this is allllllll part o' the plan.
It's not often that I feel bad for a dude in a Yuri Manga. Mostly cause about 99% of the time they're either background/side characters or outright the antagonist. Hario seems like a pretty stand-up guy though, and he really does love Ema, too bad the poor fella doesn't realize his happy ending and Ema's don't exactly line up.