Sounds like maybe the one time scene when crashing into Shizuya and co for the first time.
It could also be Flahne from Mhenga, if your Exhibitionist score is high enough to go at her under her desk, there is a potential scene where someone walks in to customs and "catches" you, and i think it's a little based on chance whether you get someone who is offended or someone who gets all hot about it ?