Mizuki Ashiya has such a crush on a track star named Izumi Sano that she moves from the U.S. to Japan to enroll in the all-male high school he goes to! Pretending to be a boy, Mizuki becomes Sano's roommate...but how can she keep such a big secret when she's so close to the guy she wants?

Mizuki's big lie gets even messier when her male alter ego starts dating Julia, the transfer student from America. Plus, a certain devious teacher targets Mizuki's friend Nakatsu and levies charges that could ultimately get him kicked out of school! As she struggles to keep her cover and her cool under pressure, things heat up more than ever for Mizuki and her classmates.