Fly Me to the Moon, Volume 1: 07/26/22
Fly Me to the Moon, Volume 1 by Kenjiro Hata (2018) is the first volume of a manga that was adapted into an anime. Yuzaki Nasa has been teased for his name for his entire life. He decides to be the best and get into an elite high school by acing the entrance exam. All that changes when he's hit by a truck — but not isekaied. Nope, he's saved by a beautiful pink haired girl who offers to marry him just before he blacks out.
Fast forward through months in the hospital and rehabilitation. The mysterious girl is a distant dream as far as Nasa is concerned. Having not gotten into high school (or even taken the exam) he has changed directions. He's working and living in a tiny apartment. Then out of nowhere she appears at his door with the paperwork to get married.
The remainder of this first volume is their first night together. They get married. They figure out their sleeping arrangements. Both are embarrassed by everything but both are respectful of each other's boundaries.
I have volume 2 on hand and will be reading it soon.