The Man Behind the Glasses

From MangaPlaza website: Aya Zaizen, 31, works at a famous Japanese trading company. There, she serves as assistant to executive Keiichiro Kijo. Though Aya's earned the trust of harsh and hard-headed Keiichiro, she's never been in love before and considers quitting to pursue that experience instead. Keiichiro doesn't agree, and after interrogating Aya, suggests he'll be her lover instead. The spicy, long-awaited tale of a domineering director and his virginal assistant, now in manga format!