What happens when the hottest guy in school is a girl?!? The Prettiest Boy In School...Isn't A Boy!Japanese-American track-and-field star Mizuki has transferred to a high school in Japan...but not just any school! To be close to her idol, high jumper Izumi Sano, she's going to an all-guys' high school...and disguising herself as a boy! But as fate would have it, they're more than classmates...they're roommates! Now, Mizuki must keep her secret in the classroom, the locker room, and her own bedroom. And her classmates--and the school nurse--must cope with a new transfer student who may make them question their own orientation... Personal Best High jump champion Izumi Sano has realized that his slender new roommate Miyuki is a girl, but he's decided to keep her secret so she doesn't get kicked out of their all-boys' high school. Now they're becoming good friends, without worrying about "guy" or "girl" stuff--or so Miyuki thought until Izumi kissed her one night! Before Miyuki has time to freak out, in steps a bigger problem: her American half-brother Shizuki, who's not too thrilled to find out that his little sister is cross-dressing 24 hours a day. But handsome Shizuki has problems of his own...