The main character Shikame Chisato　and her elder brother

who went to a Hanko Nisshinkan School as a swordplay instructor surrogate.

Hers childhood friend, Minoji Sakai also,

he went to there, where women are usually not allowed to attend,

he was worried about Chisato going …

And an encounter with the boys（Gisaburo Shinoda,Matahachi Ito） who go to Nisshinkan School ,

Towako Yamamoto who goes to as a gunnery instructor surrogate likewise,

the youth Kotaro Saitani who has a store Nishikiya in a castle town,

and the mysterious youth Narihira Agatuma who lives there as a guest staying

changes the respective destiny big.