A2Z

Sawano Natsumi, who works as a literary editor in a major well-established publishing company, married her husband, Morishita Kazuhiro, a colleague in the same industry, eight years ago. Natsumi and Kazuhiro have no children and are rivals in business. One night, her husband confesses to her that he has been seeing another woman for over a year. As a result, Natsumi, out of loneliness rather than spite, finds herself starting a relationship with Naruo, a young employee working at a post office.
“A2Z” is an adult love story that follows a woman in her 30s as she traces her love, marital relationship, and work life through the alphabet from A to Z.
(Source: Drama-Otaku)
~~ Adapted from the novel "A2Z" by Yamada Amy (山田詠美).