Skirt no naka wa kedamono deshita.
The manga version is more explicit (shows the femboy’s cock more). In the anime, you get a brief glimpse of the shaft. No glans shot unfortunately….

Since it was one of the company’s earliest anime, they were likely still trying to figure out what part of the man turns people on. They focused on the woman more instead at the time. Luckily, their newer titles have improved on this aspect, but I do hope we get a season 2 of this series or a new erotic femboy Hentai from them.