Extra episode in the 7th Blu-ray and DVD volumes.

Hotori Arashiyama loves mysteries, but there's one she just can't solve: why does the solution to one problem inevitably seem to lead to another? Like how when Hotori has to start working at the Seaside Maid Cafe after school to pay off a debt and her friend Toshiko fortunately knows exactly how a Maid Cafe should be run. Which is fortunate since Hotori has no clue. Except that, unfortunately, Toshiko has no interest in working at the cafe—until she discovers that Hotori's childhood friend Hiroyuki is a regular. Which SEEMS fortunate. Except that Hotori doesn't know that, while Toshiko likes Hiroyuki, Hiroyuki secretly likes Hotori, while Hotori secretly has a crush on... No, no more spoilers! But if that's not enough drama, there's work, angst with a certain math teacher, table tennis between her classmates, her younger brother versus the school's bad girl... And yet, even though everything seems like it's going to crash at any moment, somehow Hotori's life keeps going hilariously forward. (Source: Sentai Filmworks)

The gang goes to an indoor swimming pool for some fun in the sun. As expected, all hell breaks loose when Tomoki goes on one of his perverted missions. Meanwhile, Nymph is having some issues with the loss of her master and considers asking Tomoki to be her replacement master. This episode was not aired on TV because it was deemed too dangerous...

The film's story is set four years after the events of the original Shirobako anime. Aoi Miyamori keeps busy dealing with the ordinary troubles in her daily work at Musashino Animation. After a morning meeting, Watanabe talks to Aoi and puts her in charge of a new theatrical anime project for the studio. The project has unexpected problems, and Aoi is unsure if the company can proceed with a theatrical anime with its current state of affairs. While dealing with that anxiety, Aoi meets a new colleague named Kaede Miyai (voiced by Ayane Sakura). She and the MusAni team work together to complete the project.