History classes have never interested Saburo. He never saw the point of
learning something that happened in the past, let alone a few hundred
years ago. But when he falls off a wall, he travels through a wormhole
and ends up in 16th century ancient Japan. He meets a very young Oda
Nobunaga, one of the most influential figures in Japanese history, who
turns out to be identical in appearance as Saburo. The real Nobunaga,
sick of the castle life and wanting to travel, orders Saburo to take his
place. Without knowing how to get back to his time, Saburo tries to
make sure history isn’t rewritten for the infamous Oda Nobunaga.