Pheromone Gisou Anken

Despite her alluring charm and reputation as a "bewitching angel," Yori is actually a virgin. However, her appearance often leads her into romantic entanglements...

Yori has a crush on her boss, Ujiie, who always helps her out. He asks her to pretend to be his girlfriend so he can decline the arranged marriage of the managing director's daughter, and she agrees. However, everyone in the company now thinks they're dating...!?

(Source: Shogakukan, translated)