During a school break, A-Ko yearns for romance, sparking a rift with C-Ko who flees and narrowly escapes an accident with a biker named Kei. As A-Ko toils at a job to fund a special dress, she encounters Kei, igniting a sudden infatuation. Meanwhile, B-Ko also fancies Kei, oblivious to the fact that C-Ko holds Kei's affections.