The Prince Who Played Dumb

Adrian Alaric time-travels, becoming the cruel Prince of Juno, plotting a coup. He gives up usurping the throne, requests demotion to Prince of Yarrow to develop his fiefdom. Using modern knowledge, he makes his fiefdom prosperous. Intending to refuse the Crown Prince position, he instead, through accidents, reaps rewards. His enemies (Minister of Revenue) suffer, and the Emperor values him more. Ultimately, 'forced into business,' he plays dumb, conquering the world.