One day, a mysterious letter 'F' starts to be written on doorplates in a condominium building. Since then, mysterious incidents consistently occur around Yukari Yamamoto, who is an ordinary female high school student living in the building.

Eyes

When pregnant Mia Sakaguchi falls from a staircase at the shrine, she is transferred to 1994 and immediately admitted to a mental institution, because no one believes her that she is from the future. There she is confronted with the shocking truth that the mentally ill are forcibly sterilized. In order to protect her unborn child, she tries to escape from the institution.