This is a book written to Mr. Wang. The book is composed of letters, conveying feelings and feelings, one letter every day, without interruption (unless anything unexpected happens). In short! I just write here my daily experiences and thoughts, what I think in my heart. In my case, there are no gorgeous words, but only the love that grows day by day. The reason why I came up with the idea of writing an essay is that I hope that my thoughts about him will leave a mark when time is about to pass. I hope that when you read this book, you will smile, be in a good mood, and be happy every day.