Although this book was published in 1883, the protagonist's sales strategy is still being used today. It turns out that targeting female consumers, bait products, and 1+1 were already used in this period. Therefore, this book is a book where you can discover the love story of the department store owner and store clerk, and even the department store sales strategy. This book becomes a very useful book for those who want to learn marketing/selling strategies other than love stories.