The Demon Lord’s Daughter: Demona (魔王の娘デモーナ)

DLSite :
If you like the game, please buy it to support the studio using my referral links. So that I can buy more games to translate. You can also use the banner too. Many thanks.


Demona, who was spending her days of games and comics in her room suddenly received a call from his father, the Demon King.
When she went to meet him, she was given “Next Demon King Trials”.
Demona reluctantly accepted.
What kind of adventure is waiting her in the future? …

English patch

Updated May 24 2020:
If you still encounter Missing / Can not open files error, you can do one of these solutions:

Solution 1 (thanks to Zyts) is a little advance:
Open the original data\System.json file, look for "encryptionKey" for example "encryptionKey":"3337381473e04c05fafc4db52fac78cd.
Copy the parts and replace it in the "encryptionKey" of the translated System.json

Solution 2 is easy but has fallacy:
Just copy the original System.json to the folder data\
It will work but now the main menu is in Japanese.

English patch version 0.4.2 (this is the version of the patch not the game). Please buy it or pirate elsewhere.
Patch status : Machine Translation: 25%, Human Review: 75%. You now can understand most of the story with this patch.
Link v0.4.2:
Link v0.4.3 (update solutions for missing files bug in readme):

I decided not to monetize with any URL shorten site because they always want to hijack and abuse push notification of your browser. Just deny all if any shorten site asks you. Honestly, I hate the shorten link affiliate
In the future, I may have affiliate with DLsite. At that time buying game helps the studio and help me too.

Installation guide

Copy data folder to <Game Folder>\www\data. Overwrite any existing files. Only copy and overwrite existing files. If you delete the folder \www\data before copying, you may miss some files.
These are json data files so it’s not virus. Just scan them to make sure. Leave me a comment if you have trouble.

Come back for more updates. I will review and edit every 2-3 days in my free time.

Bugs, FAQ, Support

Sometimes, it will say you are missing a file. Please email me that file name. My email is: hentairanch{at]gmail[dot}com

If you want to fix it temporarily, copy that file from the original installer of dlsite to folder \www\data. Of course, it will contains Japanese.

19 thoughts on “The Demon Lord’s Daughter: Demona (魔王の娘デモーナ)

  1. after i put the data folder in the www file then merge the two folders the game stops working and just tell me fail to load “a certain file”
    i bought the game from dlsite

    1. I’m sorry for the late reply. Please apply the version 0.3. If you can see which file is missing e.g Map81.json Please let me know so I can fix it.

      1. Having the same problem with 0.4 and I don’t see any link to try 0.3. Cannot load img/system/Weapons3.png. This file is there, but is encrypted (rpgmvp)

        1. Ok I have checked it. This is because I haven’t updated the game since translation. I have just uploaded version 0.4.1 that fixed this. Please tell me if it works. This is my first game that I translate so please give me feedback.

          1. I can’t see the v0.4.1. I checked the v0.4 but it seems to be the same patch as before. And it gives the same error.

          2. I am sorry but somehow my post was not saved. I have just re-edited it. Now you can see the proper link to 0.4.2

          3. Thanks for the upload! 🙂

            Still, it doesn’t work for me. I still do get an error right on game startup complaining “Failed to load img/system/SomeFile.png”. The file seems to be random, sometimes it is ButonSet.png, sometimes Weapons3.png and so on. But always something from img/system/ directory.

            I have tried several versions: dlsite and pirated ones from bedta and svs. In all versions I am having the same problem.

          4. Please change the encryption key as Zyts solution. If this does not work, there are 2 more solutions:
            1.Difficult method: Open the original System.json and look for “encryptionKey”:xxxxxxx , copy it to the translated file
            2.Easy way: Copy the original System.json and override the translated file. It will work but your main menu is in Japanese.

  2. In file www/data/System.json
    At the end of the file change from
    “encryptionKey”:”3337381473e04c05fafc4db52fac78cd (or whatever)”

    1. Thank you for the solution. I don’t know that they change the encryption key maybe for every download.

  3. I got error when I start the game : Failed to load “img/system/Weapons1.png” when I retry it sometimes put me others stuff like shadows.png

      1. Can you give me the code e.g RJxxxx or RExxxx? I have a game waiting in my translation queue but after that I haven’t decide what I should translate yet.

  4. <3. Thanks for the hard work. I'm glad I stumbled upon your site. Looking forward to the rest 🙂

    No pressure. Just have fun with it.

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