Based on

Movies like Business Trip ONANIE Female Manager's Mobile Vibrator (1995)

Reiko is selected as a section manager at an underwear manufacturer and develops new products through trial and error. The great thing about the panties she designed was that they enlarged the pubic area from the mons pubis, making the bulge of the pubic area even with clothes on, making it even sexier. After its release, these panties received an unexpected response...