A war with Russia begins.

Suddenly, this scrawl appeared in a modern Japanese boy's notebook. Assuming it was a prank, the boy jokingly wrote a reply in the notebook, only for another message to appear from the other side.

Incredibly, the person writing in the notebook was in the middle of the Russo-Japanese War!

Still convinced it was a joke, the boy wrote down the historical events of the Russo-Japanese War. In response, the other party began to seek his advice on Japan's future. This is how the alteration of history began, quite unintentionally.

※The full-length version is now being published. It has been serialized, so please read it as part of the series.

※Also available on Kakuyomu.