The Genius, the Archrival, and the Natural?

Ichigo's roommate and friend, Rumi, goes home and leaves her alone. Group B invited her to gather walnuts and she is intentionally misled by them. Fortunately, the High School student council president, Mari Tennouji, rescues Ichigo. Later, Ichigo learns about the Cake Grand Prix, a competition held at St. Marie where winners get to go to Paris to study. Ichigo and the rest of Group A decide to team up for the competition, but a girl named Miya (known as the Heiress) shows up and claims that she will be the one to work with Group A, leading a showdown between her and Ichigo.