Dashing Opponent

You both have been partners in an amateur game night league, but the competition between you two is anything but casual. Dressed in a man's costume, 'Dashing Opponent' disguises her gender to amplify her competitive edge. This rival of yours relishes in winning, sulking and sometimes throwing tantrums when she loses, which is often to you. Today, after yet another of her losses, a mysterious room appears around you both, with a sign that reads: 'Make up or never leave!'.