Well, the story is kind of simple but still attractive, the protagonist of this series starts being a weak guy who's being bullied in school, to the point that he may even die there. He knows a girl there whose granpa is the leader of a dojo in which the gratest masters on history gather and later on they take the protagonist as a disciple.

This is not the usual manga where the hero is fighting and then for some memories of his past he goes berserk and destroy the enemy in a few seconds. In fact, something he learns is to never go berserk. He's not the typical "gifted kid" who doesn't need to train and just fights a couple times to get big improvements, in this story the hero really puts a huge effort in training and learning techniques, you can see closely his improvement as the story develops.

In general, there are very good fights, an "all time comedy" even in the death matches, pretty good character development (there are a lot of characters in this series and increases in every arc), nice strategies (which usually make this kind of stories more attractive), nice artwork (at the beggining is not good but it gets better the more the story advances).

The only reason i give the story a 9 rather than 10, is because it's a little simple, yet it's full of unexpected scenarios and even being like this it's original. I say is kind of simple, but it's not like all of those "standard" shounen manga stories which always go in a loop (beat some guys, then they find the mastermind, fight him, when everyone is defeated the hero goes berserk with the power of friendship and defeats the boss, a couple filler chapters, then someone evil shows up, and the the story repeats).

And unlike most of the fighting series in which everything starts as "normal" fights and then everything ends in dragon-ball-z-like-fights with everyone using beams, and destroying complete buildings or even mountains with one attack, this series shows you the real secrets behind the techniques, of course the fighters are over human capacities, but the really astounding ones are the master class fighters, and even they have limits...I guess XD

Well, just to end this, you'll probably like this manga, this one got a nice mix of -almost- everything you'll expect for a story, I'm still halfway (260 chapters read of a total of 450 chapters) but i can say, this is one of the best series of its kind. totally recommended.