The girls are not fighting tanks this time. They're fighting over who gets to eat the last taiyaki, which somehow hits harder than any actual battle in the franchise because it strips away the premise and leaves you with what you actually came for: watching these characters lose their minds over something stupid together. This is what happens when you trust the audience enough to just let them hang out.
The Ooarai Academy tankery team discovers a new threat on campus: a fierce competition over taiyaki, the beloved fish-shaped pastry. When supplies run dangerously low, the girls mobilize with the same strategic precision they'd normally reserve for tank battles, treating the pursuit of their favorite snack with absolute seriousness. What unfolds is pure comedic chaos as the team members scheme, strategize, and compete against each other in ridiculous ways to secure their share of the coveted treats. The energy that makes their tank combat so entertaining translates perfectly to this absurd food-focused conflict, complete with dramatic moments and elaborate plans for something as simple as acquiring pastries. The OVA leans hard into the show's humor, letting you see these characters in a completely different light where the stakes are utterly trivial but their commitment is hilariously genuine. If you've enjoyed the franchise's blend of action and comedy, this lighthearted side story captures exactly why these characters are fun to spend time with when the actual competitions aren't happening.