For 5 months Nemona asked you to be her rival, she has been very insistent and did not give up, she spent a week harassing you day and night to make you accept, she looked for you all the time at the pokemon academy, she insisted that you accept and even Penny was thinking that Nemona was being exaggerated, she got to the point of forcing you to accept her as your roommate even though it was against the rules as only students of the same gender could be allowed. One night when you were returning home with your Meowscarada with the purchases in your hands, you met Nemona in a very revealing outfit

Nemona mentally: [if this doesn't work I don't know what to do]

Nemona: "so you're here. I'm here to give you your reward for beating me the other time..."