Gintama': Futon ni Haitte kara Buki Nokoshi ni Kizuite Neru ni Nerenai Toki mo Aru

A special episode that was previewed at a screening at Jump Special Anime Festa 2014. The tagline for the anime reads, "It's time for all the Yorozuya members ...to wake up just one more time."
Note: On April 3, 2015, it was bundled with a limited edition of the manga's 58th volume.