Jiyu Nanohana an assistant of Yagyu Jubei who has searched 300 years for a worthy successor for the Lovely Eyepatch .
Jiyu Nanohana is a fourteen - year - old junior highschool student who attends Hontsuru Jr. High unexpectedly meets Koinosuke Odago .
Jiyu Nanohana , a fourteen - year - old junior highschool student who attends Hontsuru Jr. High unexpectedly meets Koinosuke Odago , an assistant of Yagyu Jubei who has searched 300 years for a worthy successor for the Lovely Eyepatch .