Sei Kaihou, Sorezore no Ai no Katachi

At 27 years old, insurance broker Mio Sahara is the perfect age for marriage. Traumatized after a sexual encounter with a man, she's developed an intense phobia of being seen in a sexual light. One day, when she's put on a team of elite brokers, she meets a new boss who teaches her what it means to feel untameable passion. Emboldened by this encounter, Mio resolves to face her true sexual self that she had locked away in her heart, but it won't be easy... (Source: MangaPlaza)