There isn't much to say about this short series, it might as well have been a arc in the main series instead of being it's own thing, so this will be a short review. Art: It's Itagaki, his art is a acquired taste but i love it. 8/10 Characters: Funnily enough, this series is very character driven, it's interesting seeing Itagaki's interpretation of a younger Bunshinchi, alongside with his friendship with Kido, it makes for some satisfying interactions. The Story: It's mostly about the 2 main characters relationship and goals, there's this former sumo wrestler that shows up, he's pretty much a really strong jerk of the likes of Yujiro and tosome extent Shozan, but there isn't much to him that makes him memorable in any way, too bad that this has pretty much no impact in the main series except that it is some extra content

Overall
It's an ok spin-off/prequel that does some decent stuff, i would only recommend it for those who are already familiar with the series