This story is interesting, not linear one, but like flash back
The story started about quite a peaceful time, after a previous war, but of course there are people that wants to wage war again, and Fuusuke, now just normal civilian dragged because the group that wants to started the war are new ninku users, and they targeted the previous captains of ninku, so Fuusuke trying to unite with the other remaining captains......
is this over? no, because after this arc the timeline of the story shifted to before war, when Fuusuke still learning about ninku and meet the other people that also wants to master ninku for personal reasons
The characters is unique, but unforunately not all important characters got a backstory, just Fuusuke and some other person
art : well I must say here, the art is terrible, it almost like it just draft that become manga
so if you interesting with the quite old manga and interesting story, but also could bear with the drawing, this manga is nice to try read more