That's a good name, right?
Anyway....My girlfriend's what?!
Alright, so there are two possibilities for this:
1. A superhero-esque RP, staring One Normal, Average Guy, and one Superheroine in disguise.
You know how it goes...he's a normal, average Joe..perhaps he does have a successful Job that he's worked hard for, but he's still a normal guy at heart. So one night, Mr. John Doe here goes out to a bar to unwind and have a little fun, when he meets a woman there. The two hit it off, sharing a nice talk that leads right back to his apartment for a night of wild fun.
The next morning, she leaves but gives him her number, so he decides to call later that evening, and when she picks up, he hears something strange in the background, something sounding like gunfire and grunts, but he puts it off as the TV being a little loud. So the two setup another date, and thus begins a relationship.
Now, as you may have guessed, our girl here has a secret life. She is, in fact, a superhero. (Powers are up to your choice. ;P ) This is something she keeps secret from him because hey, if he knew , he would obviously become a target, and she doesn't want that.
And the rest can be worked out
2. A normal average guy...and the daughter of a Mob Boss, specifically the leader of the largest cartel in the country. It starts innocently enough, when he meets her out..shopping? at a bar? Somewhere! and the two talk, and sparks fly. Of course, he's a little surprised when a black car rolls up and two goons step out, saying that they will be escorting her back home. Still, he thinks nothing of it, because hey, she might be rich and need that kind of protection. She still gives him her number, and he calls her later. The two spark up a relationship together, and when she invites him over to meet her parents, that's when he finds out just exactly who he's been dating.
<3 So there are the two ideas I've had in my head.