Unpacking Resource Files from the Visual Novel Akogare

debug

galgame

diary

Author

Guest_1013

Published

2026-07-28

Viruses?

This article may contain softwares that are not verified as virus-free. Use them at your own risk.

Legality?

This article is written out of my pure technical interest. For legality issues, I DO NOT recommend anyone doing it.

Akogare: The Game

I came across this game from a rather popular single-bg music video of Alphazone - Flashback (Original Mix). According to the comments below, this character in the bg is named 瀬能恵理 (Eri Senou) from an ero visual novel named Akogare (憧れ), made by FOSTER.

After a hard, long-lasting search, I found it on this website (no voice version). Naturally, I got an idea of locating the actual picture in the resource files.

Preparation

The archive contains 4 files:

.
├─Akogare.CCD
├─Akogare.cue
├─Akogare.img
└─Akogare.sub

I use [WinCDEmu] to mount the .cue file as an external CD drive, extracted the files, and run the setup program (using Locale Emulator, on my non-Japanese Windows 11 computer).

The files after installing:

AK
├─AK.EXE
├─AK0.FA2
├─AK1.FA2
├─AK2.FA2
├─AK3.FA2
├─Flag**.sav
├─README.TXT
├─SETUP.INI
├─system.dat
├─System.sav
└─UNINST.EXE

in which .FA2 files should contain all resources.

Unpacking

There are 2 main tools for unpacking old galgames, Crass and GARbro.

For convenience, I used GARbro. It’s very easy to use: just select the file to be unpacked, and the software will show all files in the form of files in a folder.

The pictures are in AK3.FA2, in the format of .C25: (* for numbers, _ for characters)

AK3.FA2
├─BG**.C25    # images of environments
├─E_***.C25   # non-ero scenes
├─H_***.C25   # ero scenes
├─S_***.C25   # characters with transparent background
├─ze_***.c25  # the ending(?) without staff info
└─ze_***_.c25 # the ending(?) with staff info

Characters of `_`	Represented Characters
A	御田朋代 (Mita Tomoyo)
C	瀬能恵理 (Senou Eri)
E	松永真貴子 (Matsunaga Makiko)
F	中野静 (Nakano Shizuka)
G	穂高ひかる (Hodaka Hikaru)

And the initial image in that video is AK3.FA2/EC009.C25. Right click on the entry in GARbro, select Extract, select the folder and format, then you get the original images in your desired format.

--- title: "Unpacking Resource Files from the Visual Novel _Akogare_" author: Guest_1013 date: 2026-07-28 categories: - debug - galgame - diary --- ::: {.callout-warning} # Viruses? This article may contain softwares that are not verified as virus-free. Use them at your own risk. ::: ::: {.callout-warning} # Legality? This article is written out of my pure technical interest. For legality issues, I DO NOT recommend anyone doing it. ::: # _Akogare_: The Game I came across this game from [a rather popular single-bg music video of _Alphazone_ - _Flashback (Original Mix)_](https://www.youtube.com/watch?v=7NQ0TLFaqGo). According to the comments below, this character in the bg is named 瀬能恵理 (Eri Senou) from an ero visual novel named [_Akogare (憧れ)_](https://vndb.org/v4070), made by [FOSTER](https://web.archive.org/web/20030801083516/http://www.foster.gr.jp/main00.html). ![Banner of FOSTER.](/images/banners/foster-ban.gif){#fig-foster} After a hard, _long_-lasting search, I found it on [this website](https://www.anime-sharing.com/threads/990604-フォスター-憧れ.1770411/) (no voice version). Naturally, I got an idea of locating the actual picture in the resource files. # Preparation The archive contains 4 files: ```bash . ├─Akogare.CCD ├─Akogare.cue ├─Akogare.img └─Akogare.sub ``` I use [WinCDEmu] to mount the `.cue` file as an external CD drive, extracted the files, and run the setup program (using [Locale Emulator](https://github.com/xupefei/Locale-Emulator), on my non-Japanese Windows 11 computer). The files after installing: ```bash AK ├─AK.EXE ├─AK0.FA2 ├─AK1.FA2 ├─AK2.FA2 ├─AK3.FA2 ├─Flag**.sav ├─README.TXT ├─SETUP.INI ├─system.dat ├─System.sav └─UNINST.EXE ``` in which `.FA2` files should contain all resources. # Unpacking There are 2 main tools for unpacking old galgames, [Crass](https://github.com/000ylop/galgametools/blob/master/crass-0.4.14.0-final/INSTALL.txt) and [GARbro](https://github.com/morkt/GARbro). For convenience, I used `GARbro`. It's very easy to use: just select the file to be unpacked, and the software will show all files in the form of files in a folder. The pictures are in `AK3.FA2`, in the format of `.C25`: (`*` for numbers, `_` for characters) ```bash AK3.FA2 ├─BG**.C25 # images of environments ├─E_***.C25 # non-ero scenes ├─H_***.C25 # ero scenes ├─S_***.C25 # characters with transparent background ├─ze_***.c25 # the ending(?) without staff info └─ze_***_.c25 # the ending(?) with staff info ``` | Characters of `_` | Represented Characters | | --- | --- | | A | 御田朋代 (Mita Tomoyo) | | C | 瀬能恵理 (Senou Eri) | | E | 松永真貴子 (Matsunaga Makiko) | | F | 中野静 (Nakano Shizuka) | | G | 穂高ひかる (Hodaka Hikaru) | And the initial image in that video is `AK3.FA2/EC009.C25`. Right click on the entry in `GARbro`, select `Extract`, select the folder and format, then you get the original images in your desired format. ![The initial image.](/images/blogs/20260728/EC009.png){#fig-EC009}