Manga by author Nakajo Hisaya

Japanese-American Mizuki has gotten herself into 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 doctor--must cope with a new transfer student who may make them question their own orientation... Chapters 2 and 7 of After School are untranslated.

A collection of HanaKimi side stories and an epilogue.