The origin of the 48 sex positions, "Oedo 48 sex positions", is explained in full with video and narration for each move!! If you master the various sexual techniques between men and women that began in the Genroku period, you and your partner will be captivated by ecstasy!! It also includes practical examples of "Oedo 48 sex positions" seen in the background of the Genroku period, such as the nighttime companionship of the head of the family and his wife, the secret affair between the head of the family and the maid, the perverted play of the head of the family peeking at the maid's sexual activities, and more!!