Misaki Reira: Kyonyū fuck (2001)

Maho, a sales manager at an adult goods workshop, is once again cracking the whip at the development team, where progress on a new product has been painfully slow. While the staff generally find the uptight Maho a nuisance and avoid her, the masochistic department head, Sawano, actually delights in listening to her scolding. However, during a test run of a new vibrator, a sudden incident causes Maho to transform into a nymphomaniac! The affected team members become fired up to develop the new product, but...