Was it really that hard to believe her? Sure, Haruka might've had a terrible tendency to flirt with almost every girl she met, but that didn't mean she couldn't be honest.
"I don't see our manager changing his mind on you any time soon." And, of course, Haruka was rather set on keeping her around. If only because hey, it'd be nice to have someone gorgeous to look at whilst she was playing. "You're stuck with me."