I genuinely love how historical/alt-fantasy c-dramas just... throw you right in the deep end. "Here is a setting with established alliances and backstory, you get a three second primer and then we're moving the fuck on, so keep UP." It's engaging as hell!
Even so, it's a different approach to the one taken by western media; I'm not saying I'd turn out a diagram or a summary from time to time (though possibly I lean on fandom to provide equivalent explanations at times?) but I do like having to figure it out as I go.