This manga is designed to teach Japanese elementary school children how to write essays. It explains the basic rules of writing Japanese essays as well as strategies to improve your writing. The authors of this book, Kaori and Yukari, are also its main characters. As this is written for children, they use easy Japanese and straightforward explanations, and there is furigana on all kanji.
The unique thing about this book is the writers' claim that writing a Japanese essay and making ramen is similar. They draw on this analogy throughout the book to help explain various points. For example, the writers use an image of ramen to describe the basic structure of a sentence. The ingredients you put into ramen are the techniques you use to improve it. They also talk about what kind of service you should provide to your customers to be a good ramen chef. Then they explain how the same ideas apply to writing an essay. This new approach can be confusing at first, but you'll become more and more comfortable with it as you become familiar with the style of the book.