Several thousand years after humanity ventured into space, Tokugawa Mitsuhiko, the president of a small transportation company, Tokugawa Transport, along with his ex-military wife Kyouko, his brother Seiki, and the uncharismatic android Kiyomaro, were working hard to pay off the loan on their newly purchased spaceship, Kanagawa. However, they were suddenly swept into a dimensional space stream while on a job. The place they landed was a past version of Japan, but it was subtly different from the history they knew. Despite the fear of altering history, the three of them, who love themselves more than anything, decided to live freely in this world. This is a work that has been revised from the prototype of a certain secondary creation written in the past. Although it is categorized as a historical genre, it is quite distant from real historical works, so those who dislike such stories are advised not to read it or to skim through it lightly. Note that some characters who were active in real history may die unexpectedly, or the opposite may happen. Chapters 5 and 75 are side stories with strong interlude elements, and the timeline is mixed, so for those seeking a fast-paced story, it is recommended to read only the main story in sequence. (Currently, the full seven volumes are available from MF Books.) The manga adaptation is now being released on Piccoma, and the PV for the manga adaptation is available on YouTube! https://www.youtube.com/watch?v=4EJJi5BwzJQ