Mature Content Description

The developers describe the content like this:

This Artbook and Application package may contain content not appropriate for all ages, or may not be appropriate for viewing at work: Nudity or Sexual Content, General Mature Content

All characters involved in sexual content are over the age of 18.

About This Content

The Artbook that records the production process of ISEKAI QUEST,
and a digital album containing all CG and animation included in the game.
If you liked the game, please consider buying this!

-Unpublished illustrations
Containing illustrations that could not be included in the game due to system limitations.

-Concept Art
Check out the character's design process and settings that couldn't be expressed in the game.

-Designer's commentary
Let's look at the back settings of the characters.

-Illustration technique
Check out the drawing processes of artworks by snapshots.

Please note :
Contents included in the digital album can also be unlocked in the game.
The Artbook and digital album are downloaded to the folder where the game is installed, which can be accessed in :
-> Manage -> Browse local files