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Oboreru Knife   
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Official English: INKR

A beautiful and mature sixth grade girl from Tokyo suddenly has to move out to the country side of Japan with her family. The girl, Natsume, then meets a boy and from then on she begins to feel 'something' in her body, like a surging wave.

Official English Translation

This manga has been adapted into a JDrama live action movie on Nov 5, 2016


Related Series

Associated Names
Drowning Knife
Drowning Love
Oboreru Naifu
Shattered Knife
The Knife That Dropped in Water
À fleur de peau
السكين الغارقة
물에 빠진 나이프

Groups Scanlating

Latest Release(s)
v.12 c.46 by Evil Flowers & ShoujoHearts about 1 year ago
v.12 c.45 by Evil Flowers & ShoujoHearts over 2 years ago
v.12 c.44 by Evil Flowers & ShoujoHearts over 2 years ago
Search for all releases of this series

in Country of Origin
17 Volumes (Complete)

Completely Scanlated?

Anime Start/End Chapter

User Reviews


User Rating
Average: 8.5 / 10.0 (324 votes)
Bayesian Average: 8.31 / 10.0

Last Updated
April 14th 2024, 12:56am



Category Recommendations





Original Publisher

Serialized In (magazine)
Bessatsu Friend (Kodansha)

Licensed (in English)

English Publisher
Azuki (digital)
INKR Comics
Kodansha USA (17 Vols - Complete; digital)

Activity Stats (vs. other series)
Weekly Pos #700 increased(+82)
Monthly Pos #1237 increased(+373)
3 Month Pos #2333 increased(+374)
6 Month Pos #3327 increased(+176)
Year Pos #4065 decreased(-102)

List Stats
On 1232 reading lists
On 1096 wish lists
On 237 completed lists
On 79 unfinished lists
On 483 custom lists

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User Comments  [ Order by usefulness ]
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They all need therapy *sigh*  
by twinklehoy
June 23rd, 2023, 9:08am
Rating: N/A
After reading this manga I feel like I've lost some good hours of sleep I'll unfortunately never get back. It starts well and end then goes downhill. Some other people already explained it better, but yeah.
Spoiler (mouse over to view)
If you want to read a manga where the FL gets almost raped by a creep when she's 12 years old, then 4 years later by the ML and she just accepts it and sees that situation as overwriting the trauma from her past (with another trauma) , this is the manga for you.

... Last updated on June 23rd, 2023, 9:22am
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Satisfying ending  
by Blackpennn
November 6th, 2022, 8:13am
Rating: 10.0  / 10.0
I've read this before but the manga I read before has not so good translation, I really didn't understand it but loved it because it's psychological-romance,
Spoiler (mouse over to view)
I've had mixed feelings against kou before; 'that he chose violence over her, loves her but not enough to choose her. Then read it again and realize that I love natsume and kou's character equally (despite natsume's flaws. she's quite hard to love because she's so selfish haha )
I've re-read it again, and this time I understand why they did what they did (even though it's a manga that still makes me think every chapter) it has such a good ending. at the end all I felt was peace, even if the
Spoiler (mouse over to view)
relationship/circumstance look really painful because even after their son happened they didn't marry or have communications, because at the end it said that after haruto they don't have communication, then met again after 17 years, and 6 months from then got married. And really for otomo I think natsume was a good experience for him. vice versa.. no lingering feelings/thoughts that it should've been otomo. Because if she stayed with otomo she won't be what she is at 55, that conquered japan, cos even if otomo would support her it won't last in their 20-30s, he'll want her to settle, and natsume really loves that thrill she's experiencing through cameras. and for kou I don't think they got back just because of their history(I've read somewhere that they think its just because of history.) She truly loves kou she just love Otomo as a person but not romantically, she loves how otomo is so stable,so natural, so kind, accepting so ideal, she loves the quality that otomo can offer. And even if she's deceiving otomo, or has something troubling her, otomo doesn't notice, she has to say it, while kou and natsume can understand each other with just one look, and In natsume's case looks and actions. (I actually think that natsume notices that too she has just desires so she ignores it, but subconsciously knows.) While the love natsume and kou have for each other is based on connection, they have this understanding, acceptance quality in their relationship, that no matter what the other do, they'll still love each other,accept it, understand it, they're always pulling each other up. They have this CONNECTION. Kou, I don't think he really was sad too in his life before their marriage, he seems so calm, so at peace, so accepting that I don't think he's suffering before her. So I think the prediction of that ends with just mentioning that blaze. (I look forward to my review next year! I wonder what'll change? Haha)
Also! Love the supernatural!! It makes so much sense if you guys keep that in mind. Don't know why it doesn't have supernatural in genres when the core of the story is supernatural.

I've read one review that says kou is invincible, he's sooo NOT! Kou's so damaged, full of insecurity, If he's invincible then why's he suffering? And the four leads Natsume, Kou, Kana, Ohji
Spoiler (mouse over to view)
just needs self-love, it's the root of their sufferings. Kou didn't really experience love, writing this makes me realize how he is so sad. Wanna cry, haha

... Last updated on November 6th, 2022, 9:04am
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Amazing ride  
by Eilaeila
October 5th, 2022, 1:27am
Rating: N/A
This manga started off amazingly. The chemistry between Natsume and Kou was otherworldy and the narrative was most of the time poetic. Although fair warning, this is not your average shoujo as it is griped with violence, sexual abuse and trauma and death - very slice of life and very George Asakura. What struck out to me the most was the familiar feeling of putting your beloved on a pedestal, believing they are invincible and perfect. Once this shatters as it does, the relationship crumbles. Without words, you can feel disappointment reflected on their eyes even when you both wanted to make it work and that is painful. How truly fragile relationships are.
I read the manga in one sitting and unfortunately, in the late chapters, it felt kinda rushed. The initial poetic storytelling got lost in the pace and I felt like reading on just to see how it ends.
Spoiler (mouse over to view)
Kou was, at the start, intriguing, likeable and attractive despite his many flaws but when he hurt Natsume (in multiple ways), all the redeeming qualities he had vanished. On the other hand, Natsume had no concept of self love or self worth. Realistic as it is, I wish she had made Kou repent for all the hurt he caused. What Kou did in the ending wasn't enough to make up for all the good he could have done but didn't for Natsume.
Ootomo deserved better. He was heart broken twice - by Kou and Natsume. Mid story there was no more character development from him and his relationship with Natsume, so meeting with Kou was expected.

Overall I still loved this manga. I will probably reread this in the future to relive the feelings of puppy love, teenage angst. I suggest reading the author's other works as well.
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Man, this story is frustrating...  
by moonmystery
July 13th, 2020, 5:42pm
Rating: 7.0  / 10.0
I think I'm getting too old for this teenage angst stuff. It used to seem so cute and romantic, like the "epitome of teenage years"..... but man, seeing her deal with her PTSD is just rough.... these kids are too young to figure it out on their own, and end up lashing out at each other... If only they had accessible therapy...

... Last updated on July 13th, 2020, 5:44pm
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Strong start, left something to be desired...  
by MermaidAiera
September 28th, 2018, 11:57pm
Rating: 8.0  / 10.0
The artwork in this series is what I enjoyed the most. The eyes are so expressive while at the same time suggesting a deep intensity of sorts. In this sense, I would have loved to see the modeling/acting career take a front seat to it all, just for the sheer satisfaction of seeing so much artistic expression.

That aside, the story line started out with a lot of potential, and Kou & Natsume's relationship offered a lot of room for growth, character development, and intense moments. However, the author threw so many wrenches into the plot that things fell off kilter quickly. This choice wasn't necessarily bad however, because it added another realistic perspective to going through tragedy and navigating life when things don't go as planned. Asakura's portrayal of grief, trauma, and emotional scarring emphasizes the difficulty of the healing process. Characters in the story lash out, fall into themselves, feel unworthy, and are unable to cope. On one hand, this is all quite real, accurate, and 100% possible if people don't get/seek help in dealing with trauma. But on the other hand, this manga really misses a chance to develop it's characters, and it really leaves the reader frustrated and let down over and over again.

The most disappointing aspect of this manga is the missed opportunity to delve deeper into what it means to start life over when all seems lost. Just when it seems like there's an opportunity for the characters to grow/become more dimensional, they instead show no initiative to be better or move forward, and efforts from other characters to facilitate healing always fall flat. After a while the story began to feel tepid and stagnant. There is never time given to properly exploring Kou's psychological background and reasoning for his actions, though at times it is implied. Natsume's trauma plays out again and again, yet is sadly never remedied in a healthy way, and is actually severely triggering. The other characters remain one-dimensional, and their attempts to affect the plot are half-hearted and feel like a waste of time.

This story line is of course a reasonable and REALISTIC way things could play out in real life, which in it's own way is refreshing, yet heart wrenching. It kept me turning the pages, hoping that on the next one there would be some headway made. The consistency of the tragedy leaves readers mired in the story, clinging desperately to moments of joy while falling back, almost as familiarly as the characters do, into the dark pit of depression that holds them in a vice-like grip.

Overall, the story is worth a read. Despite the fact that it falls short in many ways, some of those ways are definitely my opinion and not hard facts. Asakura avoids the common cliches and brings to the table a raw and refreshing look at real life struggles and feelings, and tells a story that gets readers emotionally involved and painfully moved. Top it off with hauntingly beautiful and unique artwork, Oboreru Knife is a mature story with serious themes that stands apart from much of the lighthearted drivel that the manga world is rife with.
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Started off good but went downhill  
by kira6
September 22nd, 2017, 7:00pm
Rating: N/A
I remember reading this and liking the beginning, so I came back to finish up the series but god did it go downhill.

Spoiler (mouse over to view)
Natsume truly attempts to move on from being nearly raped, but Kou does not. At first we are led to believe that Kou left Natsume for "her own good." He was unable to protect her from the rapist, so he willingly gets out of the picture. He leaves Natsume so Natsume can find happiness with Otomo, who is the “nice guy.”

Ok, he gets into fights, he’s rude, he’s selfish, he’s turning into the stereotypical “bad boy.” But I still think he’s a good guy, trying to do what he thinks is right in a frustrating way. And the author was clearly letting us know that Natsume and Kou would get back together. When it happened, I thought I would be ecstatic. I shipped them. There was no way anything could go wrong. But yes, yes it did.

After the rape incident, Kou had no redeeming qualities about him whatsoever. And believe me, I LOOKED. I WANTED to find a redeeming quality about him. But all I found was reasons for Natsume to avoid him with a 10 foot pole. Just a few: he baited his brother into being beat up in his place, he pimped out a girl that liked him, forcefully kissed his brother’s girlfriend in front of Natsume to get back at her (and afterwards the brother slapped the girlfriend?????), and we haven’t gotten to the worst one yet folks. I still kept reading, hoping for a redeeming change before they inevitably got back together.

But here we go folks, the way they get back together. Kou basically blackmails, hits, and rapes Natsume. Repeating the first traumatic incident a second time. The author literally draws a superimposition of the old rapist on Kou since Natsume sees him as the old rapist. But then she opens her eyes and goes “Oh, it’s Kou.” She accepts it, because “he, too, was unable to move on” or something. Basically, she can't help but go back to “save" her violent, abusive, first love who showed no redeeming qualities whatsoever after they split. This all happens while she’s with still with Otomo, so she goes to break it off with him out of guilt.

I truly had high hopes for this manga when I started reading so long ago. But I can’t bring myself to read past this second rape. Apparently Kou turns sweet later on, and him and Natsume end up happily ever after. But does that negate what he did?

... Last updated on September 22nd, 2017, 7:10pm
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by cecropiamoth
February 19th, 2017, 5:53pm
Rating: N/A
Just a couple of chapters make clear that this manga is going to give us a positively thrilling picture of how sexual desire feels to a girl who's never really felt it before. This is going to be a winner!
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It's great  
by bossmama
July 17th, 2016, 10:35am
Rating: N/A
But I want to address some things here
Spoiler (mouse over to view)
I feel like Kou's character overshadowed Natsume's. As a character he is more intense, layered, and fascinating. Natsume is a strong female lead, she also has her own share of traumas and burdens, but I guess she's just a more realistic character than Kou.
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Captivating and Powerful  
by tamamomaru
February 12th, 2015, 7:49pm
Rating: 9.7  / 10.0
There's something unsettling about Asakura's style here that is both lewd and elegant. Those eyes! Art style itself gave me guilty pleasure as I read this series in one sitting. There's so much more to this story than the usual web of tumultuous love between utterly flawed personalities. There are bigger topics that are tackled here that you wouldn't find in a mainstream shoujo. Children in a crumbled society with failed adults, a premature death of innocence, rampant with corruption and absent of love-- All dark and gripping. At times I thought "No! It's too much." Yet, it knew I needed more.
I thought I had issues with the character's ages at first, but the world they're wrapped up in is so believable that the way they behave makes so much sense, I'm vicariously nodding at ever dramatic turning point. Not to mention that world! Interweaving folklore, old money, and adolescent angst in a small country town governed by the sea and it's superstitions. Sound like a mishmash of genres? Maybe as I have described it, yes, but it's all there and all complementary to one another in order to deliver the unique tone of this well crafted story.
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Loved it until  
by skatergirlyui
December 1st, 2014, 8:04am
Rating: 7.0  / 10.0
Gave it a 9 until the 50s where it ended up turning into the cliche type of shoujo where
Spoiler (mouse over to view)
The girl is finally properly dating the nice guy, tries to confront the bad boy, gets threatened into hanging out with him, gets abused, breaks up with the nice guy out of guilt, and finally gets together with the abusive guy. Who of course suddenly turns sweet a few chapters later.

So much wasted potential
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