Gintama Season 4 Episode 2: Battle on Rakuyo Arc: Part 2 - Leave Letter
Episode 2 of 12 of Gintama Season 4, aired January 14, 2017, 25 minutes. Available with English subtitles and dub where released.
Episode summary
When they learn the truth about the current situation, the gang realize that they must go into battle. And so, too, does Kagura.