Don't be confused. This is not a 7 first kisses sequel, it was not supposed to be an advertisement drama special..

the moment the production decided to add more lines for the product placement than the plot/character development was the moment they threw away the viewers worth.
honestly I don't think I've ever seen a drama so bluntly advertise their sponsored products this much. "I've never found this fried chicken outside of korea", "this makes my skin moist", "this boosts your stamina", "this mask is a best seller" and blah blah blah ;/ if anything they made me want to buy those products even less.

one of their biggest problem was how they show you an event like ep11's over dramatic ending and then the next ep they start from a pre setup and repeat everything again and get to the point only halfway through the ep. (that's not how cliffhangers work)

the lines were so cheesy and cringe worthy it was embarrassing, and the acting from the 2 mains was mediocre and the only reason it was acceptable was becasue everything else sucked.
the romance lacked substance and it was too rushed that it made it seem like taeul only loved yigon's money. they had zero on screen chemistry and no amount of neck kisses (which was just 1) could save their so called love.
speaking of kisses, they start with the cliche open eyed fish kiss, gave 1 neck kiss and went back to "covering their face with a hand or something" so it looks like they're kissing but it was obvious they were not ;D and I don't personally care for kissing scenes since they don't add to the romance but enhance it, and so if the actors feel uncomfortable having more than 1 kiss they shouldn't be forced into it.

the plot was a literal zero. an empty flashy mess of a story. nothing was consistent, nothing made sense and nothing was explained.
this is what happens when the writer gets a deal to make their drama after only writing the 1st couple of eps, it was obvious she only had the start idea and the end (which was a total cheap move full of fan service) so she was lost most of the time.

now the directors all take the other part of the blame. the switching between the 2 worlds was so bad that no one could tell which world they were in until someone's name was mentioned ;/
the audios were always such a mess, the chewing were too loud and every sound felt artificial, like ep11's footsteps. it felt like a zombie apocalypse..

they had so many side plots and characters unrelated to the main plot that it was hard to know who was who and what purpose they held, but worse part was that nothing was explained and thus they were just fillers..
everything big and flashy uncle evil seemed to work towards was pointless. he looked scary and evil but was caught in 1second, they talked big of time stopping but it never became an issue..

so to sum it up we had 1 ep of plot, 14 eps of fillers and angst and 30min of resolution followed by 55min of fan service~
as if the 2 worlds was not confusing enough they had to add time traveling, but alas how else would they have had saved their empty black hole mess of a plot?

Jo Young / Jo Eun Sub and Myung Na Ri / Myung Seung Ah were the highlight of the show for me, both as actors and as characters so I'm incredibly disappointed by the wasted potential. they could've had 2 more couples in this and increased the level of uwu but anyway, the Jos and the Myungs had better chemistry and more believable love lines and though I was happy with their end, I was again disappointed that they didn't really show them together much...

young was such a cold, professional no nonsense kind of a guy but his social life (shown only as laptop sticker -I wonder whose idea was that) and his interactions with both eunsub and their puppy twins showed how much more of a sweet warmhearted person he was. I wish this drama was about him ;(
https://mydramalist.com/35039-the-king-the-eternal-monarch#comment-3574531
eunsub was laid back, easy and friendly that people (ie the 2 mains) took advantage of and forgot several times, but his interactions with young was beautiful, they were the only 2 sane unselfish people (beside the Myungs). and in the end I loved his growth to a solid reliable man~
also since I don't want to share spoilers here I'll link my comment https://mydramalist.com/35039-the-king-the-eternal-monarch#comment-3565969

the music was a repeat/ripoff of goblin and they did nothing to add to the already non existent mood, and I didn't even want to watch this the 1st time let alone rewatching it (though I have rewatched WDH's scenes alot)