Umi no Yami, Tsuki no KageDarkness of the Sea, Shadow of the Moon; Moon's Shadow on a Dark Sea; Umi no Yami, Tsuki no Kage; 海の闇、月の影; 海之闇月之影; 바다의 어둠 달의 그림자; คำสาปเงาพระจันทร์; Ánh trăng bí ẩn, Biển sâu thăm thẳm; La oscuridad del mar, la sombra de la luna

Two twin sisters contracted a mysterious bacteria from a trip and suddenly gained enormous power. One psycho sister began trying to kill the other because they both loved the same man, while the other sister and her boyfriend began to flee as everyone else became innocent victims...