B-ko develops a crush on C-ko, and is determined to win her over. B-ko's attempts to win C-ko over fail, however, and remembering that she was A-ko's rival back in kindergarten, B-ko creates a series of mecha piloted by her team of female followers to attack A-ko each morning. After losing each new and more powerful mecha, she eventually creates and dons the "Akagiyama 23," a powered suit that looks like a bikini. B-ko quickly escalates the fight across the school with no restraint.