Sakurasaki Academy is a boarding high school for boys, where handsome guys gather and attract girls' crazy pursuit. One day, a transfer student from the United States came to the school-Ashiya Mizuki (played by Horikita Maki), but no one knew that this "he" was actually a woman dressed as a man! In fact, Mizuki came all the way from the United States for one person: Sano Izumi (played by Oguri Shun). Sano once saved Mizuki, but was accidentally injured. Later, he gave up his high jump career and was full of decadence. The guilty Mizuki came back to "save" Sano. In the process of helping Sano regain high jump, Mizuki also made many good friends: the cute and straightforward Xiuyi (played by Ikuta Toma), the playboy Nanba Minami (played by Mizushima Hiro), the mysterious Kayashima Daiki (played by Yamamoto Yusuke), etc. Mizuki and them wrote the most beautiful youth movement together.