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 seal on him had weakened
after a thousand years.
El sello que lo aprisionaba 
se debilitó con los años.
O selo colocado nele se 
enfraqueceu depois de mil anos.