I forgot the title of this Jap novel. Why do their titles have to be so long? Plot from what I can remember: MC is from modern-day Japan. She's the daughter of a high ranking noble, who's most likely going to be engaged with the prince. But she doesn't want to, since the prince can practice polygamy. So to escape her fate, she wants to lose her virginity. Masquerade ball, one-night stand, tada! No more virginity. But the person she apparently hooked up with is the very prince who she doesn't want to marry. Any help is appreciated!