She didn't ... B4 this date with POS guy she purposely said out loud in class that she going to dinner date with him .. purposely want otaku-kun to hear about it
Ya know, I don't know why this series is called Phony Fortune-Telling Gyaru, because her powers are the real deal. Maybe it'll turn out this is all a dream, and she actually did get together with otaku.
I think it's about her own perception of herself. She never expected for the ball to start actually working.
And, also, the ball can't fix her own love problems.