A Cool Girl and a 12cm Promise

Promise of 12cm with Cool Girl

A Cool Girl and a 12cm Promise
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A Cool Girl and a 12cm Promise

Promise of 12cm with Cool Girl

Kakkoi Onnanoko to 12 cm no Yakusoku • Kakkoii Onnanoko to 12 Centimeter no Yakusoku • Kakkoii Onnanoko to 12-centi no Yakusoku • 12cm Promise with a Cool Girl • A Story About Becoming Cooler Than the Cool Girl • Una chica genial y una promesa de 12 cm • カッコいい女の子と12センチの約束 • Lời hứa 12cm với cô nàng ngầu lòi • Kakkoii Onna no Ko to 12-senchi no Yakusoku • Крутая девушка и двенадцатисантиметровое обещание

Origination: Manga
Demographic: Josei
Published: 2023
Status: 📖 Ongoing
Translation: 📖 Ongoing
Ranked: #2,579
Followed by 7,531 users
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In elementary school, Tomoaki Kanba meets Ibuki Tachibana, a tall, boyish girl, and promises to become taller and “cooler” than her as they both enter their growth spurts. Four years later, Ibuki has grown into an even more handsome young girl! Now attending the same high school, they remain close friends, but Tomoaki and Ibuki are still 12cm apart, both height and in their relationship. Will this gap ever close, or will it keep them apart? A heartwarming romance about two students falling for each other while embracing their true selves.


Serialization of the Twitter webcomic A Story About Becoming Cooler Than the Cool Girl.

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More Info

Authors: Ziki Masaya
Artists: Ziki Masaya
Genres: Comedy, Drama, Romance, Slice of Life
Theme: School Life
Publishers: Gamma!

Tags

  • Tall Female Lead
  • High School Student/s
  • Popular Female Lead
  • Cool Female Lead
  • Beautiful Female Lead
  • Childhood Friend/s
  • 21st Century
  • Androgynous Female Lead
  • Childhood Promise
  • Japan
  • Short-Haired Female Lead
  • Short Male Lead
  • Time Skip in First Chapter/Prologue
  • High School Student Female Lead
  • High School Student Male Lead
  • Masculine Female Lead
  • Height Difference
  • Dense Male Lead
  • Female Lead Falls in Love First
  • Tall Female Short Male
  • Reverse Trap

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Reviews

Dante381 avatar

Dante381

2 reviews1,249 follows

Posted 12:17 PM · Jun 20, 2026

Recommended
9/10
Reviewed through Ch. 66 · 87%

Untitled review

Completely disregard Tjo's "review", check his profile for the rest of his" reviews" if you wanna get a chuckle, it's just garbage after garbage comments lmao. If you're into tomboys or if you just want a great romcom read this, it's worth it, it's great.

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ReishiW avatar

ReishiW

3 reviews229 follows

Posted 8:11 AM · Jun 9, 2026

Recommended
9/10
Reviewed through Ch. 66 · 87%

Untitled review

I'm a straight guy and this manga straight, honestly I get why it's sometimes called "yoai bait" but it's really cute and wholesome atp and like reminding me my single ah so, if your into cute tomboys girlfriend you outta read this. (Imma say it again. this manga js straight)

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Darkvoid15 avatar

Darkvoid15

2 reviews3,689 follows

Posted 2:17 PM · Oct 2, 2026

Not Recommended
4/10
Reviewed through Ch. 74 · 97%

Untitled review

I am telling you dont read this it so bad the charecters are super frustrating the Female Leads is just clueless and the male lead is doing anything but addressing the situation

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Recently Posted

Tjo avatar

Tjo

13 reviews144 follows

Posted 1:35 PM · May 29, 2026

Community Review
Reviewed through Ch. 61 · 80%

Untitled review

author reeeeeaaally didnt want the yaoi tag cause this is basically it

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