Consumed by negative emotions, Douman is transformed into a giant demon. He now possesses within his body Antenmaru, a demon sealed away over a millennium ago by the desperate efforts of the Ketsuno and Shirino clans. Not even Seimei’s voice can reach to Antenmaru when Gintoki stands before him with his aura-charged wooden sword. How will Gintoki fight the great demon who has returned after a thousand years?!
The desire everybody had to save
Doman-san drove away the darkness.
La oscuridad se alejó gracias a que 
todos deseamos salvar a Doman-san.
O desejo de todos, de salvar 
o Doman, expulsou as trevas.