I’m Supposed to Be An Undercover Cop, Not The Sister-in-Law!


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A comedic and cute story about a little rookie police officer entering the underworld.

Ha, this underworld boss is quite handsome eh.

Ha, this underworld boss is a bit crazy.

What? What do you mean he fancies me so I have to climb into his bed.

He was here to be a spy, not the sister-in-law ok!

Associated Names
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Related Series
Evil Cult Undercover Gets Exposed Everyday (1)
My Childhood Buddy Keeps Trying To Turn Me Gay (1)
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Latest Release

Date Group Release
09/07/19 BlackBoxTL c8 (end)
09/07/19 BlackBoxTL c7
09/07/19 BlackBoxTL c6
09/07/19 BlackBoxTL c5
09/07/19 BlackBoxTL c4
09/07/19 BlackBoxTL c3
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09/07/19 BlackBoxTL c1
Write a Review
15 Reviews sorted by

izayaYY rated it
September 23, 2019
Status: --
I really don't mind MCs who are innocent lovable idiots with low IQ, and acts like a child throughout most of the story. I guess, it all depends on how skilled the author is in convincing you that such a character exists and make it believable and likable. Obviously not the case here but this story is more like a silly sitcom with restricted plotlines, relying more on comedy and definitely just meant for lighthearted entertainment.
7 Likes · Like Permalink | Report
dday0425 rated it
December 27, 2021
Status: Completed
This story is humorous. 😂 It is full of nonsense jokes and illogical behaviours, yet it's so fun to read.

It's refreshing to read this kind of light heart novels once in awhile.

I don't know whether I should call the MC dumb or just naive, lol. If this were to happen in real life, the MC would have already be dead hundreds of times. How can anyone be that innocent?

On the other hand, the ML, as the underworld boss, is very scheming. I'm surprised, but also not surprised, with how the... more>> story unfolds (it's as expected from the boss). But honestly, when I read it, I didn't suspect this to be

all the ML's plot at all.

Thinking that the gang members are naturally funny like that, lol.

Overall, although the plot is pretty much predictable, I still have a lot of fun reading it. <<less
5 Likes · Like Permalink | Report
FanGirlNoha rated it
May 12, 2020
Status: Completed
Sigh... What a s*upid plot! Sure, there's fluff, but it feels like the plot was written by a 5-year-old. The MC is probably the s*upidest and most passive MC I've encountered. I'd have originally give a 2star rating, but increased 1 for the translation team. Read it if you have nothing better to read and just need some fluff to brighten your day. Don't read if you want actual romance or plot.
4 Likes · Like Permalink | Report
Sonialu rated it
April 17, 2020
Status: Completed
.... It was good, sweet, cute and humorous in a way... HOWEVER!! This novel is tagged 'Yaoi' YET there was simply no such chapter or any mention to implement the whole yaoi idea - *cough* you know what I mean. Yes, it mentioned that they had a one night drunken (note; the word 'drunken') stand BUT that was literally it AKA hell not a descriptive smut filled chapter, it literally went 'ML brought MC home... next morning MC wakes up feeling an ache in the head and bum' -... more>> and that was it -_- DUDE?? Following after that, there was only a kiss which was also not as descriptive... at this point I'm just sighing ;-;

The ending was also pretty unsatisfactory and pretty meh.

To conclude as I mentioned in the beginning, sweet-cute-humorous, and a very suitable light read to maybe ease some tension you built up during the day but I'd advice you to not overly anticipate for any *cough* mature content =^~^= HENCE, four stars * * * * <<less
4 Likes · Like Permalink | Report
Fisukisuki rated it
March 6, 2022
Status: Completed
Nothing to dislike, nothing to worry about.

MC is the kind of Dense, s*upid Cute. But not the annoying kind. The Charming Simple Silly one.

Nothing to worry about because

MC and ML actually had meet long long ago and ML always watch him since then. And ML always like him.


Short, simple, and Pretty Cute. It make sense too. I'm pretty Satisfied with it!
3 Likes · Like Permalink | Report
1Sami rated it
May 12, 2020
Status: c8
MC is a cinnamon roll. He's cute and s*upid and naive. The novel is comprised of fluff and I love it.
1 Likes · Like Permalink | Report
SayMrrp rated it
September 9, 2019
Status: Completed
Basically, this story is full of s*upidity. In a fluffy and cute way. XD

It's a fairy-tale romance. It's cliché, and you know what's going to happen, but it's still enjoyable to read. It's a quick read, so why not go for it?
1 Likes · Like Permalink | Report
XavierForest rated it
September 9, 2019
Status: Completed
The story is full of fluff and the MC is a complete idiot. The plot is a bit rushed and some parts are unsatisfactorily cliché, but it was okay overall.
1 Likes · Like Permalink | Report
Eat_Angst rated it
October 28, 2023
Status: Completed
The story is exactly what it advertised.

A comedic and cute story about a little rookie police officer entering the underworld.

The plot is s*upid, The MC is silly, The ML is also quite silly. In short, this is a sweet sugar cookie without herbs or spice!

... more>> I think that the people complaining and bashing the novel think quite highly of themselves. Probably they like to imagine themselves in place of MC instead so they get angry when things dont go their way.

Anyways, I think it's unfair that the people writing bad reviews here are doing so simply because of the silly and sweet plot. You must understand that usually when you go into a one-shot or very short story, you should not go in expecting something very well fleshed out. If its short, Its either a needle to swallow or a small sweet pastry.

Dont go into a sweets shop expecting something from restaurants.

You must also remember that each MC isnt your close friend. And for people contemplating to read or not, if you're in the mood for sweet pastries then go ahead!

Its short, sweet, and silly.

SSS! <<less
0 Likes · Like Permalink | Report
Qiaoyishanren rated it
February 26, 2023
Status: --
Alright, I'll try to help you save some face Xiao Le, okay? 😂

Well... We keep seeing comments like, he's s*upid/silly but, you see.. I believe that those people who grew up in that kind of environment (orphanage) will have a strong sense of justice and a good heart, I believe that those people who grew up with nothing will be more caring and kind to others, tho as an officer he failed to see that there's a conspiracy going on for him to be ended up as the boss's wife... more>> and that's very very alarming LOL, still, from the beginning of the story, while they're all saying he's s*upid, the elders love him, and those people are nice to him, because of the kindness and good will that he has. And like what I said earlier it's indeed very alarming for a police officer to be that.. errr... Clumsy (drinking w/ Ur boss, confessing Ur a officer lol) that's why I can say that he's indeed very lucky cause boy, if this story is one of those horrific detective novel, our Xiao Le might be dead by now, so I think we need to grateful that Mr. Yang was able to get a wife before anything worse could happen 😂

Well, in our Ml's case, I'm not gonna defend him, but.. to someone who's been secretly eyeing a sweetheart without having any opportunity to hold them closely, I can't blame him when he decided to enter the red chamber first before courting his silly wife seriously. Jeez! 😂 Well, that's all. I'm done with you, You Fool! 🤣 <<less
0 Likes · Like Permalink | Report
yukicchi rated it
October 13, 2022
Status: Completed
The plot is just so-so. Kinda not a fan of how so naive the MC is but I guess if he ain't like that then he wouldn't capture the ML's heart? It's fine for a light read.
0 Likes · Like Permalink | Report
kaytiti rated it
September 24, 2021
Status: Completed
I wonder if there could be an officer that lunatic going undercover in real... impossible right... turned out it's a love scheme. Was it simpler for the ML to pursue MC in more traditional ways? But then there would be no novel 🤭

I really enjoyed and relaxed reading this short novel. Light and funny. Recommended.
0 Likes · Like Permalink | Report
Couch Potato Lady
Couch Potato Lady rated it
September 11, 2020
Status: c8
A cute and fluffy story. Don't expect any big schemes or any big plot. It's purely a short and cliche but still good kinda story.
0 Likes · Like Permalink | Report
October 28, 2019
Status: Completed
It's an okay read. A lightheadrted romance between a silly policeman and a ceo (but is actually and underground mafia Lord). Despite how it looks, there isn't really any action but it's more on the comical way of the shou falling to the gong's trap. The shou in this story is the type of naive person that raises up people's protective instinct. Thus, the people around him adores him a lot. I find it refreshing to see someone this naive and not be annoyed.

Short, simple love #reencounter... more>> love story. Not that much but it's a decent read <<less
0 Likes · Like Permalink | Report
HaiRyuuKi rated it
October 25, 2019
Status: --
MC is soooo cute to the point of being s*upid! Or sooo s*upid to the point of being cute? ???????? If you want fluff with a very s*upid MC and black-bellied ML, this is definitely for you.

P.S.: what I can't stand is the second hand embarrassment I feel because of MC's s*upidness. ????????? It's somewhat annoying when they call MC s*upid (like Ling Xiao calling Momo s*upid ref. Legendary Master's Wife) but MC here is a legit s*upid, but of course he has feelings however he is self-aware of his simple... more>> mindedness. <<less
0 Likes · Like Permalink | Report
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