Mother and son Natsuki Kisaragi who goes out and has sex in 2 seconds

The movie depicts an incestuous relationship between a mother, Natsuki Kisaragi, and her son, Toshio. The title suggests a rapid progression into sexual activities, which is reflected in the subtitle dialogue where the two engage in intimate conversations and actions. The central dramatic tension revolves around the secrecy and taboo nature of their relationship, as they try to avoid detection by the father/husband, who is occasionally mentioned or present in the background.