◆Story.
At the bottom of an old ruin, the girl who lost her memory [Mion] wakes up.
Guide Mion through the darkness with two fireflies, solve the contraptions and mysteries of the ruins, avoid the dreaded monsters and traps, and escape from the ruins.

◆System.
Fireflies guide Mion and illuminate the world of light.
Shadow Firefly] that illuminates the world of shadows and destroys obstacles and contraptions.
Use the power of the two fireflies to switch between worlds of light and shadow and lead Mion out of the ruins.
Inside the ruins are traps that could reap Mion's life, puzzle-like contraptions, and unidentifiable monsters.

◆Supported OS and recommended devices
Android 6.0 or later
Android devices with 2GB of RAM or more
We recommend using the above devices to play the game for your comfort.

(c)2013-2020 Nippon Ichi Software, Inc.

◆ Search for “Game Variety” for all your apps
Check out the rest of our mobile platform titles from Nippon Ichi Software! From console ports to board game classics, there's lots to enjoy from the “Game Variety” brand of games.
See the full listing at: https://nippon1.jp/game_variety/ (Japanese language site)

◆Inquiry form
https://ssl.nippon1.co.jp/community/support/index.php?p=form

// Option A //

To download 株式会社日本一ソフトウェア mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download 株式会社日本一ソフトウェア mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download 株式会社日本一ソフトウェア from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search 株式会社日本一ソフトウェア in HappyMod App.