To get close to her favorite athlete, Izumi Sano, Japanese-American Mizuki Ashiya moved to Japan and enrolled in an all-male high school! Now Mizuki and Sano are roommates, but can Mizuki keep up her pretense of being a boy? Unable to forget her near-kiss experience, Mizuki finds herself drawing ever closer to Sano, and not in a "roommates" way, either. The tension builds when Nakatsu asks Sano point-blank: Do you like Mizuki? Can Nakatsu and Sano's friendship survive the answer? Meanwhile, Sano's old high-jump rival returns, along with a surprising new challenger!