Schedule Slip: Due to a major blunder by a staff member, the production of the series was pushed back, and instead of airing episode 6 as intended, they were forced to use episode 5.5 instead (1-cour series never have to air extra episodes, and usually use them as extras for DVD or Blu-Ray releases). Mizushima was not pleased, to say the least, given the content of the tweet he made almost immediately after the news broke:
It's all because someone didn't do his job, it's causing everyone to be at a loss. I will never forget that person's name.
- As a result, instead of ending around Christmas Eve 2012 as it was supposed to, the airing of the final episode was in doubt. All the production team could promise at the time was that an announcement will be given at the end of episode 11. One station had announced they will broadcast Episode 12 on January 9th.
- Yet another minor slip happens later on, with the Blu-ray disc release moved a month to February, meaning the release of the second OVA/disc-only special was delayed as well.
- Happened a third time, to the dismay of watchers, with news that Episode 10 might not be ready in time (and as such would have to be aired unpolished), and that Episode 11's airing will be pushed back further, with episode 10.5 shown instead in its timeslot. The official announcement also mentioned that the final two episodes will be aired in March 2013 instead, almost three whole months after the show should have ended.