Natsuki Sato and Sayaka Segawa are high school classmates who are now both married. When Natsuki senses a shadow of the opposite sex in her husband, Kohei, she asks Sayaka for advice. What lies beyond the pain...

Hieda-sensei is a professor of archeology, with a fervent belief in the existence and power of supernatural creatures such as gods and demons. Since he can't prove anything, his belief has earned him the...