Dr. Yōkichi, a psychologist, has recently been fully dedicated to the work on his book "The Mature Stage of Modern European Sexuality," and his wife, Yoshiko, naturally becomes one of his research subjects. Unexpectedly, during the research process, Yōkichi discovers that Yoshiko surprisingly has tendencies of a sexual abuser. The next day, Yōkichi tells his best work partner, Associate Professor Muraki, about his new finding at work. In order to repair the relationship between Yōkichi and his wife, Muraki arranges for his ex-girlfriend, Hitomi, to become Yōkichi's personal secretary. At this time, Yōkichi's student, Sayoko, is also seeking his help. It turns out that Sayoko, an outstanding student who has ranked at the top of her class for four years, has forgotten to submit her report within the designated period due to being busy raising funds for studying abroad, so she seeks Yōkichi's assistance. What kind of story will unfold as university professor Yōkichi navigates through the company of many women?
