Jiang Taijun (played by Choi Minho), a popular Korean high jumper, lost confidence because of his unhealed leg injury and had the idea of quitting the school track and field team. Gu Jae-hee (played by Choi Sulli), a girl far away in the United States, was greatly encouraged by what Tae-joon said when he won the award, "Miracle is another name for hard work." She disguised herself as a man and transferred to the men's high school where Tae-joon was studying, and by chance became Tae-joon's roommate. The boys in the same class all loved to tease Gu Jae-hee, but the lively and enthusiastic Che Enjie (played by Lee Hyun-woo) had a good impression of her and couldn't help but worry about her liking for boys. Soon, the school doctor discovered Gu Jae-hee's true identity. She told the school doctor that she came to help Tae-joon and begged him not to expose the secret. The indifferent Tae-joon gradually developed a special feeling for her and gradually regained his passion for high jump... The play is adapted from the popular manga "Secretly Loving You" by Japanese manga artist Nakajo Hisa, also known as "Hana Yori Dango". This comic was adapted into a TV series in Japan and Taiwan and was very popular. The Korean version was co-starred by SHINee member Choi Minho and F(x) member Sulli, and many artists from SM Entertainment participated.