Hmm... so are the glasses a disguise then? Is her entire university appearance a disguise? Are they fake? ...
I can't accept it if so.
This plot is frankly cringeworthy, but I'm sticking with it for her cute meganekko look. It had better be real!
... Incidentally, I think the stupidest thing about this whole situation is that nobody could have a job like that AND have any sort of real relationship. By being a rental girlfriend, she is pretty much ensuring that she is genuinely single for as long as anyone remembers she did this.