This is a Japanese translation of the Chinese version of 『Learning Korean through Movies by Oseam』 written by Kim Sook-ja and Kim Gyu-jin.
This story was originally a literary work based on historical facts and was adapted into a cartoon film.
The advantage of this book is that it is written in a manga format familiar to Japanese people, and that it is based on Buddhism, so it fits well with Japanese sentiments.
At the back of the book, there is a word index that is identical to the order in which you would look up words in a dictionary, so that you can easily find the word you want.