I started thinking about this book in October 2015, and I didn't think much about it at the time, just to write a time-travel novel of my own. When I was very young, I had the idea of writing novels, and I wrote some, but I never officially published them. This is the first time I have written a novel in earnest.

I'm really grateful to the people who are reading my novels right now, really, really much. Maybe you don't realize how much support and help you have given me.

My writing level is average, writing books is completely a personal hobby, and I will be a little afraid when I first write, and I will suffer from gains and losses. I feel that the hardest part is not how to write what I think, but how to maintain my own style. I don't know what kind of style I am. Maybe I don't have my own style yet. But I'm really trying to study. Basically half of the time every day is in the code word, and the other half of the time is also thinking about the next plot.

I'm going to keep writing, find my own style, and write about the world I imagine. In the constant vacillation, I strengthened my beliefs again and again, and overcame one difficulty after another to complete this book.

Thank you again to those who read my book, thank you very much.