Umi no Yami, Tsuki no Kage subtitles
TV series. 1989. Animation, Drama. 29 min.
Also known as 海の闇、月の影, Darkness of the Sea, Shadow of the Moon, 海暗月影, Морская тьма, лунная тень, 海闇月影, 바다의 어둠, 달의 그림자.
Luka and Lumi Kobayakawa are twin sisters in love with the same man, athletic upperclassman Katsuyuki Touma. Lumi seems supportive of Luka's fledgling romance with Katsuyuki, until the twins are infected with a strange bacterium that transforms Lumi's personality and gifts the twins with terrifying psychic powers. Now Lumi will stop at nothing - or no-one - that gets between her and Katsuyuki, including her own twin sister...