After a high fever at age ten, Pia Rockwell recalls her previous life as a Japanese university student working toward a doctorate in paleontology. She realizes she has been reborn as the villainous daughter in a reverse harem otome game. Extremely timid, she has no wish to follow the villainess path. What she wants is to put her old studies to use: become a commoner, dig up fossils, build a museum and serve as its curator. Her fiancé is fated to cast her out at the graduation ball, so Pia asks to end her engagement to Rufus, the cunning son of the Prime Minister. Her shrewd fiancé may not let her go so easily, and she ends up accepting a wager from him. The result is a fantasy romantic comedy.