It's definitely one gag being twisted around over and over. I'm not worried though; Onidere, the author's breakthrough manga, was also very "one note" for quite a while ("my girlfriend is an invincible gang boss and she'll kill us both if we are discovered!"). Yet by the end it became something very lovable, with a cast of quirky, memorable characters. When it was over I felt like I was saying goodbye to cherished old friends. If this one ends up being half as charming it would be a perfectly nice time spent.
...come to think of it, Onidere also had a very pretty, supremely feminine man involved. Who also did marry a man. Ara.