I'm still a bit confused about the premise here. The show never has really gone out of it's way to explain the plot very well, probably because they know that's not why you're here. If I understand it right, while on their school trip the fighters from around Kanto who are reincarnations of Three Kingdoms Period generals have to face off against the fighters from Kyoto or where ever their school trip was and win some little medallions that I think are the Kyoto equivalent of the Magatama all the Toushi carry. I think that means these Kyoto guys are reincarnations of Japanese fighters ratherthan Chinese ones, like I said it's not really made clear.

Either way the OVA devolves into this weird rivalry between the apparent frenemies of Nanyo and Seito schools. I had assumed that after all they had been through together, all these guys would be on more friendly terms by now. I guess it's just supposed to be the nature of Toushi that they're always going to want to fight and the history of the nations they're based on was one of war. Anyway it was a neat special and somewhat interesting new setting for the characters, I give it a 7/10