What is the plot of He’s Expecting?

The synopsis for He’s Expecting has been provided by Netflix:

"The story takes place in a world where—in rare cases—men can conceive and give birth. Kentaro Hiyama, an elite ad man, suddenly finds out one day that he is pregnant. His partner, Aki Seto, never thought she would become a parent, so the two are at first confused by this unexpected event. As a pregnant man, Kentaro will face the scrutiny of the company and society, and will shed light on the hardships experienced by pregnant women. Challenged by many problems associated with modern pregnancy and childbirth, the two will have to face reality and make the ultimate decision: to have a baby or not."