Nobunaga Kyousoukyoku

Saburo, a student uninterested in history, is transported to sixteenth-century Japan after falling from a wall and passing through a wormhole. There he encounters the young Oda Nobunaga, who looks exactly like him. Eager to leave castle life and travel, Nobunaga orders Saburo to take his place. With no idea how to return to his own time, Saburo attempts to keep history on course while living as the infamous warlord.