Mayu, a female college student, has always heeded her mother Atsuko’s constant admonitions to preserve her chastity until marriage, and she has lived her life doing exactly that. Lately, however, as she has come of age, she has been troubled by a nightly succession of erotic dreams. Unable to confide in her mother, Mayu suffers in silence—unaware that, behind the scenes, Atsuko has become obsessed with a dating site and is consumed by passionate affairs with men.