ONE

Naomi is a young Japanese waitress with a Western look that a man named Joji finds himself obsessing over at first sight. Even her name, he remarks, resembles Western names. He adopts her and begins to mold her into his perfect woman. The story follows his continual perfecting of her behavior, and her treatment of him.

I got the translation from archive.org it was kinda hard to find it, and i think reading it on wattpad is way easier, since you can read it offline.