AkaTsuki: Book One [The Heart of A Samurai]

A world filled with demons without form, unable to see or hear them, the people despaired. Until one day, a family of Ki users became their saviors. The people found hope again but slowly fell into a never-ending cycle of death and hatred. The meeting of three people will set off many events that will either save everyone or...How far will they go to protect what they have?