Kakkoii Onnanoko to 12 Centimeter no Yakusoku

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Alternative Titles

Synonyms: A Story About Becoming Cooler Than the Cool Girl

Japanese: カッコいい女の子と12センチの約束

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Type: Manga

Volumes: Unknown

Chapters: Unknown

Status: Publishing

Published: Aug 6, 2023 to ?

Genres: Comedy, Romance

Theme: School

Serialization: Ganma!

Authors: Ziki, Masaya (Story & Art)

Statistics

Score: 7.01¹ (scored by 391 users)

¹ indicates a weighted score.

Ranked: #9056²

² based on the top manga page. Please note that 'R18+' titles are excluded.

Popularity: #10752

Members: 1,831

Favorites: 1

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7.01

Ranked #9056Popularity #10752Members 1,831

MangaGanma!Ziki, Masaya (Story & Art)

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Synopsis

Tomoaki Kamba admired his boyish childhood friend, Ibuki Tachibana, and promised to become "more cool" than her. However, four years have passed, and Ibuki has grown up to be an even more handsome girl! Their relationship is as unchanged as a 12cm height difference that cannot be filled...?

The curtain rises on a pure love story about a cool girl who is sorely in love with a boy who wants to be cool!

(Source: Ichijinsha, translated)

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Background

Kakkoii Onnanoko to 12 Centimeter no Yakusoku is a web manga released on the author's Twitter and pixiv accounts from February 5, 2023, to July 23, 2023. Official serialization began in Ganma! on August 6, 2023.

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Characters

Tachibana, Ibuki

Main

Kanba, Tomoaki

Main

Reviews

Jan 1, 2025

absinthe_L

Mixed Feelings

Preliminary (13/? eps)

Spoiler

Boring and cliche, it started off ok but a singular scene in chapter 11 made me drop it .

Spoiler context: the MC and the girl goes to a haunted house, she's scares and he invites her home. The lights go out, she accidentally pushes the MC down and the dad happens to return at that moment. The dad then proceeds to go on a self righteous tirade about how because the MC invited her over, he has to be careful and be responsible to avoid accidents.

First of all, it was an accident. This is giving me high school "if you knew you were ...

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May 24, 2025

shutcardboard

Not Recommended

Preliminary (40/? eps)

This manga is annoying. Not the good shoujo annoying, mind you, this manga plain sucks major dogshit at conflict- setting it up, introducing it, characters reacting to it, it being interesting or not and how it plays out etc. This manga suddenly turns absolutely terrible at everything as soon as the tiniest hint of drama drops. And it actually manages to ruin characters and most of the "story" when it comes up.

How? As for the story, let's say there is some teasing and hinting at MC's mysterious backstory that is majorly important to the main pair's relationship from the very first second. You are super ... hype! Well, fuck you. Here are 10 (not exaggerated) chapters of drama. Out of nowhere. Unfair. Out of character. And the sweet little tiny crumb of lore is long forgotten and not elaborated on any further. Sweet!

The character bit works in tandem with the aforementioned. One example is something majorly important and heavy about MC being revealed and she reacts.. for one panel.. and then forgets and spends the next 10 chapters and 99% of her time (not exaggerated) flirting with, chilling with, fixing, helping and caring for the mental of some random other guy by doing the most inane and counter productive shit that completely is against progress in her main goal while also almost completely dismissing MC- to then shout out randomly, naturally to help the other guy, that "MC IS SUCH AN IDIOT FOR NOT NOTICING HOW I FEEL ~UWU~ QQ".
Sounds stupid? Yep. It 100% is. And the way we got there is bizarre and even more stupid and out of character.

This all amounts to what I mentioned first, it not being the good shoujo annoying that comes with angst or swaying or whatever. You actually feel angry and irritated, sadly mostly due to what she does, but also at pretty much every single character involved due to just how insanely hypocritical, two-faced and ridiculously inconsistent they all are.

The only other review to date (ch 13 and a minor spoiler) pretty much describes the same thing just 27 chapters earlier. Which, if thought about for longer than 5 seconds, is pretty sad.
I am just going to be real and straight out tell how it is, this manga is not fun. Everything good that was established and set up early was handled poorly and mostly disregarded to push out one of the most formulaic and badly written, heartless, drama galore shoujo of our time.
I initially thought that a Mixed Feelings recommendation would be the most obvious choice due to the somewhat enjoyable start but it only got worse across more than 27 chapters to the point that I can defend neither the author nor the work. Fool me once and the rest.

Why the 4/10 rating? If you don't care about anything but 24/7 drama, even if it is poor quality and can only exist by having everyone act out of character randomly, this is your holy grail.

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Poll: Kakkoii Onnanoko to 12 Centimeter no Yakusoku Chapter 29 Discussion Komlan_6 - May 25	0 replies	by Komlan_6 »» May 25, 5:42 PM
Poll: Kakkoii Onnanoko to 12 Centimeter no Yakusoku Chapter 37 Discussion KM_31 - Mar 27	0 replies	by KM_31 »» Mar 27, 2:11 AM
Poll: Kakkoii Onnanoko to 12 Centimeter no Yakusoku Chapter 33 Discussion KM_31 - Mar 9	0 replies	by KM_31 »» Mar 9, 8:43 AM
Poll: Kakkoii Onnanoko to 12 Centimeter no Yakusoku Chapter 28 Discussion Komlan_6 - Mar 3	0 replies	by Komlan_6 »» Mar 3, 11:23 AM
Poll: Kakkoii Onnanoko to 12 Centimeter no Yakusoku Chapter 27 Discussion Komlan_6 - Feb 28	0 replies	by Komlan_6 »» Feb 28, 11:16 AM

Kakkoii Onnanoko to 12 Centimeter no Yakusoku
Promise of 12cm with Cool Girl
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Kakkoii Onnanoko to 12 Centimeter no Yakusoku
Promise of 12cm with Cool Girl
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