The movie is the fourth release in the Ninja Girl OV series. AV star Saki Ninomiya stars as Sora, a 19-year-old ninja who finds herself tasked with assassinating a well-guarded shaman.The movie is the fourth release in the Ninja Girl OV series. AV star Saki Ninomiya stars as Sora, a 19-year-old ninja who finds herself tasked with assassinating a well-guarded shaman.The movie is the fourth release in the Ninja Girl OV series. AV star Saki Ninomiya stars as Sora, a 19-year-old ninja who finds herself tasked with assassinating a well-guarded shaman.