Bonus Item: Bookshelf Skin
- Kakegurui Twin, Vol. 1 (Manga) comes with an original bookshelf skin to store books on your BOOK☆WALKER App!
- How to download: Start the BOOK☆WALKER App (iPhone, iPad and/or Android only) and tap [Menu] (Upper left icon) > [Bookshelf Skin List] and download the skin when it becomes available.
- There is no expiration date for downloading the bookshelf skin acquired by purchasing an eBook.