Yumi is thrilled when Sachiko suggests they take a vacation at her family's summer home. But the summer holiday turns sour when Sachiko's old friends arrive with a mission to drive the soeurs apart.
As the students collaborate with their brother school to plan the annual festival, Yumi decides it's time to teach Sachiko that men aren't as bad as she thinks.
First-year student Kanako has started idolizing Yumi, who tries to convince her new fan that she isn't perfect. But as the school festival approaches, Kanako's behavior becomes even more obsessive.
It's time for the Lillian School's Athletic Festival. Yumi and Kanako are still at odds and they decide to settle their differences with a friendly bet on the festival's outcome. But is competition really the solution?
The second-year students head off for a week of travel, studying, and unforgettable adventures in Italy! The trip takes a mysterious turn when rumors about a surprise visitor start circulating.
