Nagashima Haruna devoted herself to softball while in middle school. Now that she's in high school, Haruna believes it's time to find a boyfriend. Unfortunately for Haruna, she never paid much attention to trends and is now clueless about how to attract a boy. Through a fortuitous event, she encounters a popular upperclassman, Komiyama Yo. Haruna asks Yo to teach her how to become attractive to boys, and he agrees, but there's a catch. She can't fall in love with him.