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Nazo no Kanojo X  
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One day, a strange transfer student appears before Tsubaki. Urabe Mikoto is an antisocial girl, whose hobby is just sleeping during class-breaks. One day, Tsubaki goes to wake her up and accidentally tastes her drool... And gets hooked on that!

After that, he starts going out with her and gets to know her better. Her second hobby, as it turns out, is carrying around scissors in her panties and cutting paper into flowers...


Related Series

Associated Names
Загадочная девушка Х
Kekasih Misteri X
My Mysterious Girlfriend X
Mysterious Girlfriend X

Groups Scanlating
Aizome Scans
Eval Powar

Latest Release(s)
c.88 by TKTranslate (26d ago)
c.92 by Crunchyroll (126d ago)
c.91 by Crunchyroll (157d ago)
Search for all releases of this series

Status in Country of Origin
12 Volumes (Complete)

Completely Scanlated?

Anime Start/End Chapter
Starts at Starts at Vol 1, Chap 1
Ends at Ends at Vol 5, Chap 36

User Reviews

15 topics, 81 posts
Click here to view the forum

User Rating
Average: 8.2 / 10.0 (1082 votes)
Bayesian Average: 8.16 / 10.0
 29% (310 votes)
 19% (209 votes)
 21% (230 votes)
 15% (167 votes)
 7% (75 votes)
 3% (36 votes)
 2% (21 votes)
 1% (10 votes)
 1% (12 votes)
 1% (12 votes)

Last Updated
December 28th 2014, 11:25am PST

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Category Recommendations





Original Publisher

Serialized In (magazine)
Afternoon (Kodansha)

Licensed (in English)

English Publisher

Activity Stats (vs. other series)
Weekly Pos #526 increased(+48)
Monthly Pos #249 increased(+6)
3 Month Pos #340 decreased(-34)
6 Month Pos #222 decreased(-47)

List Stats
On 4386 reading lists
On 1001 wish lists
On 570 completed lists
On 232 unfinished lists
On 343 custom lists

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Forum Posts
Mysterious Girlfriend X Ends Next Month 89 days, 14 hours, 23 minutes ago
Crunchyroll simulpubs of Nazo no Kanojo X 350 days, 17 hours, 32 minutes ago
Urabe fetishes 805 days, 16 hours, 2 minutes ago
Chapter 21 Spoiler/Frustration 982 days, 6 hours, 15 minutes ago
Timeline Confusion 982 days, 6 hours, 32 minutes ago

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User Comments [ Order by time added ]

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Calling this slow would be an understatement.   
Rating: N/A
by kittenflaps
July 5th, 2014, 9:34am
This isn't slow. Slow implies forward momentum.

Before you read this understand there are 85+ chapters. It has been ongoing for 8+ years. This is covering 1.5+ years of in manga time.

Nothing has happened.


They can't even call each other by their first names. Readers have been supporting this thing for 8+ years. Nothing. The protagonists are in their late teens and have been dating for 1.5+ years. They don't touch. They dont move forward. Nothing happens. There is no payoff.

By reading this manga you get turned into the male protagonist. Emotionally broken and willing to settle for the tiniest scraps which you'll gobble up with gleeful tears as the outside world looks in at you and wonders what went wrong in your life that you would allow yourself to stoop so low.

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Lovingly Odd.   
Rating: 10.0 / 10.0
by SharpMonkey
September 6th, 2009, 11:13am
I actually really love this! I was originally put off by the whole drool thing and Urabe's personality, but it all just adds on to the story. I'm rather glad that Urabe doesn't have a completely anti-social and gloomy atmosphere around her.

All of the exciting encounters that Urabe and Tsubaki have make me all giddy and tingly. That's how an ecchi manga should be. This manga is just too cute!
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I like This manga a lot...   
Rating: 8.0 / 10.0
by Zetser
August 3rd, 2011, 1:34am
I really do, I've been reading it since it's prologue chapter way back when. However something about it is really starting to bug me. I understand that first and foremost it's up to the mangaka what happens with his story, and that secondly he needs to make a buck since I'm sure they don't get paid that much for their work.

However, the mangaka has laid out several things that have yet ot be resolved, or even expanded upon. Urabe's character is severely underdeveloped, the mangaka makes it plain that there is something odd about her. I wont spoil it by typing out a list of all the things you learn in the first few volumes, but even Tsubaki notices a few of these clues and hints that she isn't exactly just a school girl. Considering how dense he is, that says a lot. Yet the mangaka refuses to develop her backstory or give any other new hints about her nor has Tsubaki endeavored to play on those hints what so ever. They foreshadowed a lot in the beginning and just left it cold even up to current chapters.

Then there is the relationship development. So far it's come to a near standstill. Urabe calls the shots and Tsubaki makes due with what little ground he has with it all. He pushes the envelope of their relationship just a bit then retracts back to where he started. Even worse is that that last dozen and a half chapters have been so predictable that they feel near unnecessary. Its the same formula.
1. Tsubaki sees his friend and Girlfriend progress their relationship somehow, or he notices a fetish or role play he'd like to try with Urabe, or he gets in trouble with Urabe.
2. Insert awkward moment and near blind misunderstandings between them.
3. Either Tsubaki gets to try out a vanilla version of what he saw his friends do, or he gets to experiment with the fetish in a mild G rating fasion, or he somehow makes right the trouble he causes.
4. Everything continues on happily ever after, and everyone acts as if it never happened. No one learns a lesson, no one gets anywhere, no character development is had. Yay...

Thats not to say it isn't readable, and the author does throw in a few twists, a one sided rival of sorts, and you even come away from each chapter feeling like it's still a potentially great romantic school love comedy. But dang it all, please have some progression! Step past one of the boundaries Urabe made, or give us a flashback of her past, or have something... /anything/ cool happen.

I recommend still read, and I think that people can enjoy it for what it is and what it offers. But I fear if something meaningful doesn't happen soon that leaves a major impact on either the readers or the characters, this manga will grow stale to the point of no return. I really want it to succeed, so hopefully the mangaka gets it together and makes this story happen. Come on Ueshiba Riichi! Don't be another Rumiko Takahashi! Dont be that mangaka!
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Why you should read it and why you will like it   
Rating: 8.0 / 10.0
by kihadaka
March 28th, 2011, 5:59am
This is one of those titles that everyone should read at some point. Regardless of what you usually read, whether you're male or female, or whether you're young or you're old like me, you'll find Nazo no Kanojo X (Mysterious Girlfriend X) funny, thrilling, sexy, meaningful, unusual, and, oh yeah: mysterious. You can think of the "mystery", though, as nothing more than the means through which Akira and Urabe connect with each other. Nazo no Kanojo X is unusual... but it shows us a kind of relationship somewhere between "that was great sex, let's be friends, oh and what's your name?" and "We're not going to kiss until we're married" without ever referring to our judging other types of relationships. Akira and Urabe define their relationship for themselves, how they want it to be (though often a little slower than Akira would like, but he's a 17-year-old boy after all). That's the beauty of Nazo no Kanojo X... and also what makes it so mysterious.
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...Instead of reading comments   
Rating: 10.0 / 10.0
by HumanoidInterface
February 1st, 2009, 7:50pm
You should be reading this.

Seriously. It's great. The art is very unique, the plot is unique, the characters are enjoyable.

... Last updated on February 1st, 2009, 7:51pm
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Quite Good   
Rating: 9.0 / 10.0
by emperor26
March 10th, 2009, 9:17am
Mysterious Girlfriend X just stands out as being unusual but quite entertaining for a seinen manga.

The plot is quite intruiging, the characters each have their own personality and the drawing style is quite nice (though it something that would be found in a shonen manga).

The relationship between the two main protagonists stands out the most, and is quite interesting to see what directing it takes (and how long it will last).

Overall, I would recommend this Mysterious Girlfriend X in case anyone is trying to find a manga worth reading.
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Must be read carefully to appreciate   
Rating: N/A
by Manji88
March 24th, 2010, 7:01pm
First of all, I love this guy's art. His previous work (like Discommunication) was overwhelming--each panel looked like one of the occasional "dream sequences" he puts into X. Here he's opened up the space in his art, concentrating on the characters, and developed a new, lighter line with less spot black. And it's all a matter of taste, but I find his girls as cute as hell.
Some previous reviewers have commented negatively on things like how Urabe won't let him hug her, etc. But I disagree. Remember, Urabe said right at the beginning of the series that he's the man she's first going to have sex with. And as you see in the story, each step along the way is not only controlled by them, but, in a way, by their "bond." Urabe doesn't want to move ahead of where that mysterious "bond" wants them to be. I admit it's a little slow. You'd think that when she starts getting sexually excited due to the progression of the "bond," things might heat up a little more than they have. But it's just not "that kind of comic," apparently. Regardless, there are always lots of fun little stories and Ueshiba's fascination with how sexual relationships develop between juveniles provides him an opportunity to experiment, playing "what if?"
Fan service? Sure. But it is, after all, about the relationship between two teenagers who are "destined" to be sex partners, and a few panty shots are not exactly out of bounds. You've got to give the poor sex-starved boy something to get nosebleeds about, after all.
So far I've enjoyed the hell out of it, more than any romantic comedy I've read in years.
The recent Imai storyline has me a bit concerned about where's he's going, but it's fun to see Urabe be both reluctant (in her usual way) and and the same time kind of intrigued by the unique opportunity she's being offered. She could certainly tell them to go pound sand and walk out, but she doesn't. Even some of her dialog was charmingly cute and hesitant at that time.
Anyway, I look forward to reading it every month.
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favorite romantic manga   
Rating: 10.0 / 10.0
by jamievalero
September 19th, 2008, 8:33pm
This is one of my most favorite mangas of all time because of only one thing -- the unique way with which romance is presented. Romance is a well-worn subject in culture and art, and though the ideas in the manga has been thoroughly explored in other media -- saying no to the advances of a guy, sweeping a girl off her feet with a romantic approach, etc.etc. -- I have never read about it in the way it is treated in this manga.

The most artful illustrations in the manga are during dream sequences of Tsubaki. My most favorite dream sequence is the one where Tsubaki and Urabe is dancing -- I thought at that time, "What a great way to think about falling in love!"

Overall, I like this manga for its originality, and the weird yet delightful way with which relationships are presented. I look forward to what will happen to the characters in "Nazo no Kanojo X" in the future.

... Last updated on September 21st, 2008, 5:19am
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Was great, now so slow it drags   
Rating: 7.0 / 10.0
by MangaGhost
March 14th, 2012, 1:35pm
It started really good. It was cute, original and quirky. It was moving pretty well then the brakes got applied and its been moving at a snails pace for like the last 20-30 chapters. I hope it picks up soon I'm on chapter 61 or I'm going to have to drop it. I also read that they are coming out with an anime for it in 2012, hopefully that won't drag too. It was originally a 10, now its about 7.5 for me.
Ok got up to chapter 75 and I'm finally dumping this manga. It started off quirky and original, but all that ever happens is drool tasting chapter after chapter. Its now a tiresome gimmick and the author obviously doesn't have anything else in his bag of tricks. 75 chapters and Urabe has gone from mysterious to cardboard cut out. I mean a little more information about her character would help develop her. At a certain point the novelty of her mystery wears off and you have to develop something there. Likewise with the drool which started as an erotic subtext, but now has just become ho-hum. Perhaps "to wait is beautiful" (in regards to relationships), but wait too long and it becomes boring. Downgraded it to a 7 now.

... Last updated on April 9th, 2013, 6:39pm
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Begining is nice but now after 60 chapters it's boring   
Rating: 5.5 / 10.0
by Meins
July 2nd, 2012, 7:26am
Art is better then average. If the mangaka would make more of this cool dream pictures it would be a blast. But i suppose it take to long to draw them and he ended this. What a pity.

The Story:
Well the beginning was interesting and the characters seemed quite nice. I read the manga whit pleasure. BUT after 60 chapters and about 2 years in-story time there is happening NOTHING, ZERO, NADA. It feels like there are a lot chapters in this manga just to have more volumes to sell.

First, i hate this stupid habit to give the main male characters nosebleed every time he get the slightest excitement. He should go rather today than tomorrow to the hospital because he could bleed to death while having a wet dream.
Second, i think it's something like unprofessional from the mangaka if he/she present me story without any character development and without any climax in main arc.
As i wrote the two main characters in this manga have no character development what ever. If there is any character development than that the main male character gets dumber.
After about in-time 2 years the "lover" didn't kiss (not even once), not holding hands, not going on dates (3,5 dates/doing something together in 2 years), not doing anything together (besides their routine), not know much about each other (even the reader don't know almost anything about main female character past or family). All they do is see and talk a little to each other for some few minutes per weekday on their way back home from school and he taste her drool while doing so.
Bluntly speaking the story is a "love" story between a frigid, unsocial, violent to objects (threaten her boyfriend doing so) and TOTALLY disinterested in anything that deepens the relation girl and a nose bleeding, dumb and cowardly boy. What the manga shows is their daily routine and the things that from to time broke their routine. A have my difficulties to call this a relationship between man and woman. It feels more like they are only 11-12 years old rather than 17-18.

The 2 first volumes are really nice and you would like to read more (like me), but you will get only disappointed. There is no story in sight, the story got lost while new chapters, after the 2 first volumes, are made.

... Last updated on July 22nd, 2013, 12:54pm
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