Remember seeing the poster and telling my friend that this drama will be a no-brainer and it turned out to be exactly like that. Although I thought there will be certain amount of seriousness, which is indeed there, but even they carry the comic elements to some extent.

It has a simple story. There is a secret royal inspector who sets out on a journey to discover corruptions by the Govt. appointed officials. On his mission he encounters a lady, who due to her situations, joins along the journey. They are accompanied with 2 servants of the inspector and 2 friends of the lady. As these six people move ahead to solve different cases, they unveil tragic truths behind the crimes and corruptions made by local authorities as well as seemingly big figures behind them. As everything becomes clear, rest 40% of the drama is how they bring forward the truth and establish justice.

Ra Yi Eon (Ok Taec Yeon) is the secret royal inspector, who initially had a simple dream of making a dumpling shop and living a simple life. But due to family pressure he appears the state civil service exam to become a inspector. Kim Jo Yi (Kim Hye Yeon) is a free-spirited, quick-witted and brave lady who believes in woman independence. Oweing to her will to beat the societal norms, she strongly supports women opting for divorce, as well. Park Tae Seo (Lee Jae Kyoon) is the son of left state councilor Park Seung (Jung Bo Suk), both of them are corrupt. Duk Bong (Bo Jong Ok) is the head of Tail Island shelter.

Some popular faces in minor roles are Yook Chil (Min Jin Woong) & Goo Pal (Park Kang Sub) as Yi Eon's servants, Ra Kwang Soon (Lee Sang Hee) & Bi Ryung (Chae Won Bin) are Joyi's close friends. Cha Mal Jong (Jung Soon Won) is a trader and Park Do Su (Choi Tae Hwan) is Park Seung's son. Lee Joon Hyuk as the crown prince and VIXX N as Choi Seung Yul are guest, yet key characters.

Acting in overall from the entire cast was okay-okay. Taecyeon has come way long and his skills can be used in better way. I'm not a fan of Kim Hye Yeon, she always has the same annoying character, who only knows to cry well. Lee Jae Kyon did unexpectedly well as an antagonist, loved his acting and expressions.

I didn't really mind the plot development bcs I watched purely for the light comedy but technically it's not a steady and proper one and I think their intention was that. Introductory episodes were slow but decent. As the show progresses, the gradual improvement in premises setup and script quality, constantly grow up. It wasn't exactly good but not unlikable either. However, that lasts till 8th episode, i. e. The 1st half of the show and as soon as the 2nd half starts. Everything comes to surface by the 10th episode and the last 6 are dragged to a great extent just to fill the quota. So, things become exaggerated and repetitive in the processs. The ending was smooth and I am happy the comedy elements were retained till the end.

In another opinon, the drama should have been a 10th episode mini series and made into a good story with flawless technical aspects, even with the light comedy. There were few things of no essence, unnecessarily added to the script, regarding the individual lives of the leads, I didn't like them. Those elements made the mood of the story inconsistent and unsteady.

Director Yoo Jung Soon might not be a rookie but he's not very experienced though I liked 2/4 of his dramas. Morever, it's his first historical but given the premise of the drama and the genre, the overall execution was up to par. It could have been better in terms of representation of elements, organization and connecting of events, etc. but I don't mind since it isn't a typical sageuk.

Writer Lee Jae Yoon is in the industry for a quite a while though the only memorable drama they've written is "The Undatables" The script written by them for this drama isn't something really good but if they had intended to keep it simple and light, I think their purpose has been served. However, the potential conspiracy plotline, which is mandatory in any sageuk, didn't feel steady and engaging. The entire effort to reveal the truth has been fragmented and dispersed throughout. The drama doesn't create great impressions at any point of the story, except for the chemistry betweens the leads.

I watched till 7th episode with normal speed and was quite enjoying the light comedy but when I realized it had started becoming slower and uninteresting, I had to fast-forward the rest at 1.5×. I had intended to increase it to 2.0× later but somehow I couldn't, because it actually not that shabby and boring.

The OST composition by Dalpalan is so good I swear and there are 3 OSTs, which are very likable. He's definitely one of the accomplished composers of Korea and he knew his homework for the drama well.
"Let's Get It" by sEODo is trot track, giving a perfect mood according to the comical mood of the drama. "Need Your Heart" by ONF Hyojin is a cheerful romantic track. Kim Sawol's soulful vocals in "At the End of My Day" is very heartfelt.

Things to like in the show:

#1 Comedy elements are the best thing about the drama. The entire show is full of comedy; in fact the king and ministers were parts of it, as well. I had a good time laughing out loud. Taec was obviously the funniest, it felt like watching the real Taec through this character. All of the characters were able to deliver the comedy through their acting.

#2 This is probably one of the sageuk with least involvement of the Royal affairs. Even though all the activities are indirectly related to the Palace and there are lots of political personnel associated, I was happy that most of the runtime was shot outside the premise.

#3 This drama aslo emphasizes on Women empowerment. The FL in here is not a typical Joseon lady who's either a assassin or only the ML's love interest. She's free-spirited, educated and promotes women rights. She even supports divorce and believes in overcoming taboos set for medieval women.

Overally, "Secret Royal Inspector & Joyi" is a drama average watch: average plot, average story and average execution. It could have better in some aspects but I don't wanna complain a lot because this drama, in no way, demanded to be judged wrt the technicality though I will be fair with the ratings. It's a simple and light watch which you can binge during leisure.