A human drama filled with desire from genius director Gunji Kawasaki. This film portrays the daily life of a family operating a sightseeing boat on a lakeside near Tokyo. The mistress is constantly consumed by sexual desire, and immediately after finishing sex with her husband, she unabashedly performs intimate acts toward her father-in-law, showing no regard for her marital boundaries. This shocking development reveals the profound depths of human instinct and desire.