Nanbaka: Shusseki Bangou no Tsuita Baka-tachi!

This is everything the main anime should've been but wasn't. I actually feel like this author could've made a way, way better manga if he had all the characters from the current one, removed their edgy pasts and inserted them into a weird high school setting like this OVA had. Seriously, the main story is pure, unfiltered garbage. Well, this OVA isn't that good either, but at least it's much better than the real deal. For starters, it properly knows it's a gag comedy and nothing else. If the author had kept true to the premise of his own story without edgy, half-arsed dark pasts ... and subpar drama mixed with boring comedic relief and dragged-out battles, it would've been so great, prison setting or not.

So, what is this OVA about? Well, nothing much, as it should be. It's all just for laughs. Nothing complicated going on as it parodies the main anime by putting similar events and the same characters into a high school setting where prisoners become students and guards/prison staff becomes teachers and school staff(although there are exceptions to this rule, like hajime being a student instead of a teacher, not that he acts differently from his guard self). I wouldn't say it's hilarious, but at least it managed to make me smile and rinse away the bad taste of the butchered and minced main anime. A good ending to a crappy experience. Recommended watch, although I will never watch or read anything by this author again. Once is enough to know the style of the author and I personally find his style to be almost offensive(things like not staying true to the setting it was supposed to have is something I despise, especially if the author isn't talented enough to connect the parts properly).

OVERALL: 4/10. Nothing too special. It\s a random one-shot that doesn't cover any new content, but just goes over the plot of season 1... as a high school AU

STORY:3/10. it's just the 1st season of the anime if it took place in a school of delinquents rather than a prison, focusing on "Seitarou Tanabata" (who I only recognize as the cyan haired childish guard and needed to look up his name) making it weaker than the original story.

ART: 7/10. Same art style and animation as the main anime. Animation is pretty good for a show this bad. Characters still look like a child's first OC, ... but you grow immune to it.

SOUND: 5/10. Again, nothing too good, nor too bad.

CHARACTER: 4/10. The same 1 dimensional characters we know from season 1, this time in a school setting... wow!

ENJOYMENT:4/10. Not fun, more of a confusing chore since Chrunchyroll placed this right after the end of season 2, making me think was the finally or the start of season 3. I ended up skipping through since you'd already know all what's going on from season 1... ugh