PTAV-001 Is it okay for an office lady to show off her panties so much?

Have you ever seen girls' panties in your daily life? Moreover, a cute female employee of the same company. When I unintentionally stare at the panchira that spreads in front of me, she notices my gaze and shows off her pants with a smirk on her face. why? Why? …Is it okay for a cute colleague's pantyhose who knows her background well to show off her panties so much?