This book centers on the flow of unconsciousness traveling through the third world. It tells the story of me in the past life and myself in the third parallel world meeting each other and growing together to become a better version of myself. The three protagonists in the article are respectively a trainee lawyer who has just left school in modern times in 2025, a military advisor from the West in an imaginary era, and a high school freshman in the third world. It's a cool story that tells the story of everyone's youthful years and various mental improvements, centered on these three people.