Plot
Mizuki Ashiya, a Japanese girl living in the United States, watches a program on TV featuring a high jumper named Izumi Sano. She was amazed by his performance and begins following his athletic career. Years later, she does research on him and discovers that he is currently attending Osaka High School. The school is unfortunately an all-boys school and Mizuki convinces her parents to send her to Japan.
Oblivious to the fact that their daughter is going to attend a boys school, her parents let her go. To enter the school, she cuts off her long hair, disguises herself as a male, and tries her best to give hope to Sano after hearing that he no longer does the high jump anymore. As she settles in, an accident reveals her identity to Hokuto Umeda, the school doctor and Izumi Sano. Izumi hides his knowledge of Mizuki's gender and tries to help her keep her secret, though it sure isn't easy as many situations land Mizuki in compromising positions that will reveal her true gender.
Setting
Ōsaka Gakuen (桜咲学園?, Osaka Academy) or Ohsaka Gakuen as written in the entrance gate of the school in the Japanese drama adaptation, is an all-boys school where the series is set in. Its sister school is St. Blossoms, an all-girls high school, where the students are the exact equivalent of those in Osaka Gakuen.
There are three classes for each of the three school years. These nine classes are divided into three dormitories, as most of the students do not stay around the school area. The culture within the individual dormitories are immensely different.
Students residing in the first dormitory are mainly made up of athletes as most of them got into Osaka High on a sports scholarship. Their head of dormitory is Tennouji. The head of dormitory for the second dormitory is Minami Nanba. Their dorm has a mix of athletes and scholars in which students get sports of academic scholarships to enter the school. The third dormitory consists mainly of artistic and intelligent people and is headed by Masao Himejima. Inter-dorm rivalries are common and would get particularly intense during the school's cultural festival.
Characters
Mizuki Ashiya (芦屋 瑞稀, Ashiya Mizuki?)
Voiced by: Hōko Kuwashima (drama CD)
Mizuki Ashiya is the female protaganist of the series. She admired Izumi Sano the moment she saw him high jump on TV. She diguises herself as a boy in order to enroll herself into Sano's school, Osaka Gakuen which allows her to get closer with Sano.
She was portrayed by Maki Horikita in the Japanese drama adaptation and Ella Chen in the Taiwanese drama adaptation.
Izumi Sano (佐野 泉, Sano Izumi?)
* Voiced by: Atsushi Kisaichi (drama CD)
Izumi Sano is the male protaganist of the series. An excellent high jumper before entering high school, he stopped for personal reasons when he entered high school. He found out Mizuki's true gender due to an accident early in the series.
He was portrayed by Shun Oguri in the Japanese drama adaptation and Wu Zun in the Taiwanese drama adaptation.
Shuichi Nakatsu (中津 秀一, Nakatsu Shūichi?)
* Voiced by: Shōtarō Morikubo (drama CD)
Nakatsu is one of the students in living in the second dormitory. He likes Mizuki but he doesn't know that she is really a girl with some of his classmates believe that he is homosexual due to that.
He was portrayed by Toma Ikuta in the Japanese drama adaptation and Jiro Wang in the Taiwanese drama adaptation.
