One Room 2nd Season special included on the BD release of the main show. It follows bedroom 'role play' scenarios you have with the girls and dream scenarios you have while asleep near the girls.

A recap of Senkou no Night Raid up to the 6th episode, aired on TV instead of the real episode 7 which was broadcast online.

Mitsuo encountered Superman, an alien who is a part of a federation that tries to maintain peace in the galaxy. He then received a helmet (that also serves as a mask) that gives superhuman strength, a cape that enables the wearer to fly, and a badge that allows him to breathe underwater and communicate with his fellow comrades whom he met soon after he utilized these gifts. Superman made it clear to all Permans that their identity must be kept a secret or their brain will be destroyed should it ever be revealed and they are given a special doppelganger robot that can replace them while they are away to achieve this feat, although it is not entirely foolproof nor is it free from potential problems. These equipments then allowed them to be young Permans who try to maintain peace and help the people who are in need. (Source: ANN)

During the final episode pre-screening event on Friday, it was announced that Double Decker! Doug & Kirill TV anime will get three extra episodes. Titled Double Decker! Doug & Kirill: Extra, the three episodes will be streamed via Bandai Channel and other streaming websites between February and April 2019. The Blu-ray and DVD for the extra episodes will also be released on May 24, 2019. (Source: MAL News)