It is a story to make with one sentence that came to my mind one day. We all experience a moment when a hole is made inside our mind, but not everyone can recover it healthily. I believe many people in the world feel that the hole has been open inside their mind are more and more widespread on the spot, even if they do shopping or eat delicious foods. I wondered if we could physically prevent it, the restful moments would last a little longer. Whether someone knows a healthy way to recover or not, this book will fill their mind for a moment. And keep that filled feeling a little longer than usual.