Five minutes, and you're back at that office watching Douki-chan lose another silent round to a coworker who has zero idea a war is happening. This is the Blu-ray bonus episode, which means it exists purely because someone on staff knew you'd want more of the exact same thing, and it delivers the exact same thing: the no-name-just-titles cast, the low-key workplace tension, the animators still lovingly rendering tan lines like it's a matter of professional honor. Nothing happens. That's the point. It's a character showcase disguised as a throwaway, and if you already know why Douki-chan's face doing the thing is funnier than any punchline, you don't need convincing. If you bounced off the main series, skip it, this is filler and it knows it. If you didn't, it's five minutes of a joke you already agreed to.
Ganbare, Douki-chan Special is a single bonus episode that never aired on television. It counts as the thirteenth episode of Ganbare, Douki-chan and was released on that show's Blu-ray. As an extra installment, it offers a mix of comedy, romance and slice-of-life moments with an ecchi streak.