Un-stylish Kei is always losing the guys she is interested in to Yumi, her best friend from childhood. Yumi is tall and beautiful, how can guys not fall for her? How can Kei ever compete? When Kei loses her latest love interest, Minami-kun, once again to Yumi, she sinks into depression. But then she meets a mysterious guy who turns out to be a teacher at her school. He wants to conduct a love experiment, with Kei as his guinea pig! Will Kei be able to win Minami after all?