The flame that burns twice as bright burns half as long. So it is with the lives of young shinobi. Death comes swiftly—for the lucky ones. For those left behind, grief is a constant companion.
Ryōbi and Ryōna, elite shinobi of Hebijo Clandestine Girls’ Academy, know this pain all too well. They mourn their beloved elder sister every day.
When a mysterious phenomenon appears, everything changes. It pulls the finest young shinobi into a parallel world. There, on a sunlit island, the impossible happens. The girls come face to face with those they have lost.
The island’s enigmatic mistresses issue a challenge. Shinobi from four rival schools must compete in a contest of strength and wit. The prize is beyond belief. The winning school will learn the deepest secrets of shinobi lore—and gain the chance to finally lay their loved ones’ souls to rest.
The girls prepare for battle. But this is no ordinary fight. Questions surround them at every turn. Can the island’s hosts be trusted? Will rival schools cooperate, betray, or cheat?
And in the midst of it all, there is the island itself. Sun, sand, and fleeting moments of peace. Will they have time to enjoy it before the battles begin? Will anyone keep their clothes intact?
Most of all, one question lingers. If they win, can they bear to say goodbye again?
