Utsuro no Hako to Zero no Maria

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Volume 1 Cover
Semi-Official Opening: Reaching the Zeroth
Semi-Official Ending: Bizarre Eternity

Utsuro no Hako to Zero no Maria (空ろの箱と零のマリア, The Empty Box and The Zeroth Maria) is a light novel series written by Eiji Mikage and illustrated by Tetsuo (formerly known as 415), the series is complete with 7 volumes. While Utsuro no Hako, often abbreviated as Hakomari, is Eiji's fourth publication, it is the first to feature illustrations. One of his earlier works can be found here: the Kamisu Reina Series.

The Utsuro no Hako to Zero no Maria series is also available in the following languages:

(Note: Translation progress varies for each version.)

Story Synopsis

Kazuki Hoshino values his everyday life above all else. He spends the days carefree with his friends at school, until the uneventful bliss suddenly comes to a halt with the transfer of the aloof beauty Aya Otonashi into his class and her cold, dramatic statement to him immediately upon arrival:

"I'm here to break you. This is my 13,118th school transfer, and even I can't help but reach the end of my tether after so many iterations. So for a change of pace, I'll declare war this time."

And with those puzzling words, the ordinary days that Kazuki loved so dearly become a cycle of turmoil and fear—Aya's sudden appearance signals the unraveling of unseen mysteries surrounding Kazuki's seemingly normal friends, including the discovery of mysterious devices known as "boxes."

Character Introductions

Kazuki Hoshino

UtsuroNoHako Kazuki.jpg

A completely ordinary high school student who loves idle chatter with his friends and Umaibōs, a Japanese snack. One day, he somehow suddenly antagonizes Aya Otonashi — even though he has never met her before. She threatens to “break” him.

Aya Otonashi

UtsuroNoHako Aya.jpg

An antisocial beauty with a resolute personality. She transfers into Kazuki’s class on March 2nd — right before the end of the school year. Immediately upon her arrival, she announces her intent to “break” Kazuki.

Daiya Oomine

UtsuroNoHako Daiya.jpg

A self-centered and arrogant student who dyes his hair silver and wears three piercings in his right ear. He is also the class president and a shrewd friend of Kazuki’s.

Haruaki Usui

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A cheerful but frivolous baseball ace. He often hangs out with Kazuki and Daiya.

Kokone Kirino

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A bright and beautiful girl who cares a lot for her friends, but can sometimes be meddlesome.
She and Daiya have known each other since childhood, and their mutual verbal abuse has become legendary among their classmates ever since.

Kasumi Mogi

UtsuroNoHako Kasumi.jpg

The girl who has won Kazuki’s heart. She is docile, silent and expressionless.


  • 27th July 2015 - Translation of "Hakomari" completed
  • 7th July 2015 - Volume 7 Prologue & Chapter 1 completed
  • 19th February 2013 - Volume 6 completed
  • 26th August 2012 - Volume 5 completed
  • 31th July 2012 - Volume 5 "Before the Show Begins" completed
  • 21th July 2012 - Volume 5 Prologue completed
  • 19th April 2012 - Diamond Days completed
  • 2nd August 2010 - Volume 4 completed
  • 25th July 2010 - Volume 4 Chapter 1 completed
  • 2nd July 2010 - Volume 4 Game Explanation and Prologue completed

Older Updates can be found on the Utsuro no Hako updates page

Utsuro no Hako to Zero no Maria by Eiji Mikage

You can find the EPUB and MOBI version of the Volumes in the forums HERE.

Volume 1 (Full Text) (PDF)

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Volume 2 (Full Text) (PDF)

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Volume 3 (Full Text) (PDF)

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Volume 4 (Full Text) (PDF)

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Volume 5 (Full Text) (PDF)

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Volume 6 (Full Text) (PDF)

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Volume 7 (Full Text) (PDF)

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Dengeki Smile Bunko


Purchasing the books

There are several ways to legally acquire the books in Japanese. Please consider doing so if you enjoyed them.

You can also acquire them as eBooks (English FAQ to Book Walker):

The series is also available in Polish:



Translators are asked to register which chapters they're working on (see the Guideline page for usage rules).

Format Standards

Every Chapter (after editing) must conform to the agreed points highlighted in the guidelines below

Project Staff




Translate volume 7 
Edit volume 1Update text on that one picture... someday... maybe
Edit volume 2WIP ( EEE - Edited up to May 1st ) (Grrarr - Volume 2 progress, detailed)
Edit volume 3Incorrect tense. (Grrarr - Volume 3 (non)progress, detailed)
Edit volume 4
Edit volume 5May require changes re: punctuation
Edit volume 6May require changes re: punctuation
Translate volume 1 scans 
Translate volume 2 scans 
Translate volume 3 scans 
Translate volume 4 scans(90% done)
Translate volume 5 scansediting is done, except for exec decision needed on File:UtsuroNoHako5 6.jpg
Translate volume 6 scanstext on wiki pages not updated yet
Define punctuation & style rules Project Guidelines
TL notes for Volume 2 need to be FIXED 
TL notes for Volume 4 should eventually be switched over into /reference form (like V1)Done
Apply punctuation & style rules 
Optimize for Android appMinor/low-priority task: the B/W-pictures may need some tweaks because they don't use the thumb class, hence are big.
Translate and (finish) editing Mikage interview 
Keep volume 1 PDF up to dateUp-to-date
Keep volume 2 PDF up to dateUp-to-date
Keep volume 3 PDF up to dateUp-to-date
Keep volume 4 PDF up to dateUp-to-date
Keep volume 5 PDF up to dateUp-to-date
Keep volume 6 PDF up to datePictures out of date


Series Overview