Agmaui Sinbu

First off, understand that this is a comedy and that the plot is nearly non-existent. If you're reading it because you heard it was a gender bender, there isn't much genderbending. Just your protagonist who actually isn't really focused on, is a boy pretending to be a girl. I'm not sure I would recommend it. Some jokes are exceptional and inventive, especially chapter 3's skeleton. However,the story is confusing, and it's not worth the headache from trying to understand the plot or if there is a plot. Overall, I'd say read the first three chapters and then decide from there if you wish to continue.

Story: 3
This is by far the weakest part of the manhwa. The main character Jeong Hwan is a detective and receives a letter from his sister asking for help because all the students at her school are the potential brides for the devil. No student is allowed to leave until they graduate so she's trapped. Like any good brother, Jeong Hwan bravely crossdresses so he can infiltrate the school as a student. Yeah, that's your plot line.
From there on, it's kind of just a slice-of-life comedy with all the strange things that happen when you're trapped in an all-girls school that practices magic and is run by the devil. People get killed, and no one cares because they think they're simply being dramatic. Things happen without any rhyme or reason, and events don't seem to be tied together. The ending effectively just slaps a bandage over the plot and calls it good enough. The entire plot is resolved far too quickly.

Art: 6
I can't really say much. It's good but not spectacular. A couple of the girls look too much alike, but you can usually keep them separate.

Characters: 6
Some of the characters are decently developed. Unfortunately there are too many characters that the author tries to develop for a one volume manhwa. Several of the minor characters actually get more development than the main character. For the most part, the characters are devices only used to reach the punch line and do not reach the point of resembling actual human beings.

Enjoyment: 6 nearly 7
Like I said before, it's funny. Several jokes are well done, original, and inventive. Chapter 3 is my favorite. The skeleton, acupuncture, and statue are not what you're expecting, but that's largely what the humor relies on: blasting your expectations out the window and having fun doing it.

Overall I'll give it a 5. I wavered from a 4 due to its pure chaos up to 6 or 7 for the jokes and ended up with a 5. Play with it. Read the first few chapters and decide if you want to continue.

I cannot reccomend this at all. I read the whole thing - I swear I did. And I still don't really know what was going on. Maybe it was the messy artwork? Maybe it was the translation? Maybe the story just made no sense, but in a world filled with manga, try something else. Something that has a story line and characters and things.