Hanayome wa Motodanshi.

Chii and her husband are like any other happily married couple, except for one thing: Chii was assigned male at birth. Chii details her autobiographical account of growing up with gender dysphoria and ultimately deciding to transition in her early adult years. Shortly after Chii starts transitioning, she meets a man who is instantly enamored by her, and although he is surprised when Chii eventually tells him she used to live as a guy, he still wants to go out with her. As Chii continues to transition, her boyfriend supports her through the process, culminating in their marriage once her transition is complete.

(Source: Hachimitsu Scans)