The flame that burns twice as bright burns half as long, and
so it is with the lives of young shinobi. Death comes swiftly — for the
lucky ones — and for those still living, grief is a constant companion.
Ryōbi and Ryōna, two shinobi sisters of the Hebijo Clandestine Girls’
Academy elite, know that truth all too well, and they mourn their
beloved elder sister every day.But when a mystical phenomenon
appears, drawing the shinobi world’s finest young ladies into a parallel
dimension, everything they know about life and death turns upside down.
Taken to a strange world resembling a warm summer island, the girls
find themselves face to face with their departed loved ones.The
island’s mysterious mistresses challenge the girls