Introduction: A Russian economics expert had been making money through long-short strategies during the Russia-Ukraine war. Despite his economic success, he felt deep regret about Russia''s historical mistakes. He wrote on his blog that "Russia has been on the wrong path since the 19th century," critically analyzing Russia''s history. Then, remarkably, he traveled back in time to 1891 and found himself in the body of Russian Crown Prince Nicholas II during his visit to Japan....