This page by Hecate
Natsuko is another of the rare stories actually set in Japan. It opens with a voice talking to someone named Natsuko: "Natsuko, it has already been two years since Kataho died." It goes on to say that Natsuko herself is also dead, and that soon Maho will leave too. Flash to the image of a young woman. She is Maho, and she is one of a set of twins. The action of this story are less important than the emotions. A young man named Tetsuo discovers a picture of a woman whom is supposes to be either Maho or her twin Kataho. However, she is Natsuko, the mother of the two. When Tetsuo confronts Maho's father, he learns that Natsuko was the old man's assistant in the bioengineering lab, but she died suddenly, pregnant with twins. The man was so distraught that he cloned Natsuko into the twins she would have born - Maho and Kataho. But the science was not perfect, and Kataho and her sister became ill. So the man had to "kill" Kataho in order to save Maho. Kataho has been living in a glass tube, perserved in the aim of donating parts to Maho. (Which means magic) But it is soon discovered that Kataho's consciousness is alive in Maho's body, warning her of danger...
Kataho, Maho, and Natsuko are all one person, yet separate. And in the end, all three have to leave the man who loved them - one by marriage, one by death, and one to save another. In the end, it is a story about creating life only to find that the creator is only that, not the master of his creations.
