Mizuki Kawase is a 24-year-old office worker who's worked for her company for over three years. Generally regarded as the "ultimate perfect woman", she has always used her beauty and charm to get anything she wants - and what she wants is sex with as many of her coworkers as possible! Treating the act just like a sport, Mizuki has now locked on to a handsome new male employee named Kouki Asahina, who was assigned to the same department as her. Dead-set on making Kouki hers, Mizuki tries every method she knows to seduce him, but he seems completely unmovable. At first, she thinks that he's no ordinary person... but maybe he's actually just an idiot?! Who will win in this comedic romantic battle between the assertive beauty and the handsome, but air-headed younger man?!