From Sunny Side Up : Sayaka and Aoi's relationship goes to the dogs when another yankee girl, Shizuka, marches in to snatch Aoi from Sayaka's "clutches." The original Yankee Girl, however, is not about to let the interloper get her way!
Sayaka is a weak girl, she is always bullied by her friends at school. One day, her father has to move to another city. In this new city, Sayaka determines herself to change her looks at her new school. She wants to change her weak image to the strong one. That's why, she has to save her first love from her old enemy's threat.