This is the one that pays you back for sitting through 50 episodes of Kenichi eating dirt at Ryozanpaku. The TV anime left the manga hanging, and these bundled OVAs finally let the story move past it, which means the payoff only lands if you already know why Apachai's hugs are terrifying, why Akisame's logic hurts worse than his joint locks, and what Miu's smile does to Kenichi's spine. Fair warning: the early ones run dry and talky, and the back half sprints, so treat it less like a series and more like a stack of chapters someone animated for the faithful. What sticks is the progression. The kid who used to flinch at Niijima's schemes now stands like someone who earned it, and the masters notice without ever saying it out loud. If you never trained with him, skip it. If you did, it feels like checking in on a friend who finally got strong.

Shortly after Kenichi defeats Ragnarok, the masters of the Ryozanpaku dojo learn that several of their enemies have joined forces. The whole dojo, masters and students alike, now becomes a target for formidable martial artists. Kenichi, a once-bullied student training under the dojo's six masters, faces this new threat in an action comedy released as OVA episodes bundled with volumes of the manga and later broadcast in Japan as an 11-episode series.