在孤儿院生活的少女,风香与凛音。她们既是青梅竹马又有着如同姐妹般的关系,即使生活贫困依然向往着光明的未来。但是,造访了风香与凛音的“二次离别”,改变了两人的命运……(转自百度百科)Raised up in the same orphanage, Fuuka and Rinne were once close friends but parted company after a quarrel ended up with Rinne overwhelmed Fuuka with her martial art skills. Fuuka has a life in poverty after leaving the orphanage. An accidental encounter with renowned martial arts champion Einhard Stratos discovered Fuuka's hidden talent in fighting; Einhard offered Fuuka a job and coaching, encouraging her to meet up with Rinne again -- in a ring.