"We want to make something better than ever!" Five female employees who are serious about their work take on the challenge of developing an onahole! They thoroughly investigate the smell, temperature, amount of love juice, depth, and each female genitalia, suppressing their embarrassment! They also investigate the shape by inserting a penis into the vagina, along with male users! Everyone takes a good look at the vagina! Line up the five of them! Compare the vaginas! We thoroughly uncovered the differences between the vaginas.