Aya is having a great time being friends with Ran and Miyu, until her grades take a nosedrive on a exam. She then decides she no longer wants to be friends, but ends up getting fed up with herself and the mistakes she is making. Meanwhile, two girls from Ikebukuro, the infamous Mami Honda, and her sidekick, Harue Kudo, are taking over Shibuya! Can Ran convince Aya to come back and fight off her new rivals?