This is Evolution from Samurai story xD, if i can say it to the maker of this anime because in here i see the Samurai, actually he is Ronnin (samurai not have master) not using a katana but its seem like a medium size blade. i loved his shoes where it can hidding the knife (if i cant say like that, because i dont know what it is ) and whoa.... you give big surpries to enemies. plot this story its very simple i think is the duty of Samurai for helping their master.