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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
Mysterious Girlfriend X

Groups Scanlating
Aizome Scans
Eval Powar

Latest Release(s)
c.88 by TKTranslate (512d ago)
c.92 by Crunchyroll (611d ago)
c.91 by Crunchyroll (642d 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: 8.1 / 10.0 (1120 votes)
Bayesian Average: 8.06 / 10.0
 28% (311 votes)
 19% (216 votes)
 22% (241 votes)
 16% (176 votes)
 7% (79 votes)
 3% (38 votes)
 2% (22 votes)
 1% (11 votes)
 1% (14 votes)
 1% (12 votes)

Last Updated
March 15th 2016, 6:15pm PST

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Category Recommendations





Original Publisher

Serialized In (magazine)
Afternoon (Kodansha)

Licensed (in English)

English Publisher
Vertical (1 Volumes - Ongoing)

Activity Stats (vs. other series)
Weekly Pos #587 increased(+142)
Monthly Pos #1027 increased(+115)
3 Month Pos #1119 decreased(-21)
6 Month Pos #1097 decreased(-82)

List Stats
On 4215 reading lists
On 1024 wish lists
On 828 completed lists
On 249 unfinished lists
On 369 custom lists

Note: You must be logged in to update information on this page.

Forum Posts
Mysterious Girlfriend X Ends Next Month 574 days, 22 hours, 12 minutes ago
Crunchyroll simulpubs of Nazo no Kanojo X 836 days, 1 hours, 21 minutes ago
Urabe fetishes 1290 days, 23 hours, 51 minutes ago
Chapter 21 Spoiler/Frustration 1467 days, 14 hours, 4 minutes ago
Timeline Confusion 1467 days, 14 hours, 21 minutes ago

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User Comments [ Order by usefulness ]

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Rating: 8.0 / 10.0
by ronweasley
August 29th, 2011, 7:22pm
i dont mind a good slow romance, but these two have been dating for several years apparently and havent really made any progress. i expected more since the girl came out really aggressively at first, but this is pretty boring stuff. its too much effort for too little payoff :/
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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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What the...? This is such a failure!   
Rating: N/A
by kill-chan
May 8th, 2011, 3:08pm
At first the art is so so , but soon it gets better and better.

Anything else ... well, goes the opposite of the art: wonderful, fantastic, exciting in the first 3 volumes, but when the first "rival" comes onto the stage something ... dunno, it just goes wrong.
I wonder if the author lost his mind or something: pitiful ecchi is thrown in again and again, the characters become dumb, anything just doesn't connect anymore...

3 words for this one: just a failure!
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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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A exellent read   
Rating: 10.0 / 10.0
by l3lacklagoon
January 31st, 2011, 3:47pm
Ok first I would like to say that this manga is exellent.
Spoiler (highlight to view)
Now i would like to say that people seem to misunderstand the hero's perdicument. He doesn't need drool everyday it took some time before the sickness kicked in (looking at the first chapter, and for those who say but it was the next day prove it, Authors intentionally don't put time down so they aren't bound by that constraint.) So the Hero doesn't need drool everyday it just makes it easier. Now i will say that it is painfully slow but that is because the hero has no guts. The heroin is very understanding of his feeling and she is giving him hints but he is to dense and a coward to fallow them. Personally i like how the girls control the guys it is better then all this other shojo crap where the girl get played around with.

... Last updated on January 31st, 2011, 3:53pm
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Read this!   
Rating: 10.0 / 10.0
by Bloodkay
January 15th, 2011, 3:43pm
This is my all-time favorite manga, despite a monthly release and slow story. I love manga where the focus of the story is the development of the relationship, not building up towards a confession.
This manga puts a twist on that, but in a strange/weird/goofy way. Having only about 50 chapters at the moment, it won't take long to catch up on reading it, and I promise it's worth your time.

... Last updated on September 15th, 2011, 6:29pm
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should already have ended   
Rating: 7.5 / 10.0
by Sukets
January 1st, 2011, 11:51pm
idk...this manga is one of the most original manga that i ever readed
but somehow..somewhere...the heart warming story, just became anoying
it is a good plot...but it was too much prolonged,and it has way too much filler now.

about filler...we already have shounen jump to do that
at least shounen jump is weelky not monthly
waiting about one month to read filler is pissing me off
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Interesting and fresh   
Rating: 9.5 / 10.0
by XileDragon
October 16th, 2010, 2:19am
This is a very interesting manga, very unique in the way it depicts school romance. Traditionalists might not appreciate it because it doesn't always make sense, and there's no attempt from the author to explain it either. However, that's what makes it a breath of fresh air in the school romance genre. A good, light read.
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Koineko without cats   
Rating: 9.0 / 10.0
by fuzetsuscans
October 7th, 2010, 2:29am
2010: Most of my thoughts have already been addressed. Honestly I was waiting for more supernatural elements to return, but its turning out that the girl is just a deviant normal and not some mysterious being as I was hoping. The surreal dream sequences in the first volume have faded out, and the series stabilized, with the setting becoming a normal school in Japan (to my chargin.)

One plothole that annoyed me is how the beginning if the main character didn't drink her drool he
would have withdrawal syndromes and sickness, but by chapter 48 he can go a week without her.
Another plothole is in the earlier chapters drinking saliva could show a vivid mental image of the other person, maybe even a memory...but in more recent chapters all it does is give you the feelings of the other person, which are often misinterpretted by the recipitant.

There are some other examples of the author seemingly reversing himself, but I can forgive that since his first one shot was in 2004. I'm just glad the author had the common sense to let time flow in the series (1 year so far), which lets you suspend your belief and accept that the characters could potentially change in that year...not that they change enough....Considering how much the two interact and exchange bodily fluids and share their feelings mentally, you'd think there would at least be able to hug each other by now....The main character, henceforth to be referred to by me as Rei ayanami's cute emo-kawaii syster, is really living up to the title.

One thing that cheapens the series is it's attatchment to fate. Instead of having characters decide they really love each other for their personality quirks, there's a tendency to say "your saliva tastes better;" that physical aspect is as shallow as saying "I keep dating you because I like the color of your hair, or your breasts are bigger than other girls," and it gives up the opportunity for a monologue and the character deciding why he really likes the other person more. The idea of
being bound together by fate is also a cop-out, since it denies the characters the tension from not knowing whether they'll keep their partner or not.

Overall the series is structured like koineko, with a loyal girlfriend devoted and bound to her man. While I enjoy reading it, it has become more of an escapism than the what-if of the surreal beginning, and I hope he just hurries up and has the characters kiss, hug, make-out or do whatever they need to advance to the next stage of development and dramatic tension.

2014 update:
Everything I said stands. The ending was dreadful...absolutely nothing happened despite nearly a hundred chapters. The poor sexually repressed kid stays sexually repressed. I advise against reading this manga past the first volume. Trust me, there is no further plot advancement, and no closure.

... Last updated on October 20th, 2014, 11:35pm
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Patience worn out   
Rating: 5.0 / 10.0
by McCasper
April 5th, 2010, 2:08pm
I put off reading this series when I first saw it because I thought that the whole drool thing was to weird for me. Then when I started reading it I was pleasantly surprised by its charm and novel concept. Skip 30ish chapters later and I feel like I'm forcing myself to just catch up so I can stop and at least say that I gave it a try.

Like in a relationship where minor, annoying habits become huge problems years later I just couldn't put up with it anymore. We are told at the beginning that male lead will be the female lead's first and they already got this drool thing going but then nothing happens. Literally the only progress in the main relationship is that on the condition that male lead would otherwise get hurt, he is allowed to hug his girlfriend, otherwise he gets attacked with scissors. Okay, I know that others might prefer a slow pace but come on. The pace is so slow it makes you wonder if they're moving forward at all.

... Last updated on April 12th, 2012, 1:59am
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