"Hana-Kimi" is a popular Japanese manga series written by Hisaya Nakajo. It follows the story of Mizuki Ashiya, a girl who disguises herself as a boy to attend an all-male high school in Japan. Her goal is to get closer to her idol, Sano Izumi, a high jumper who has lost his motivation. The series explores themes of friendship, identity, and love, as Mizuki navigates the challenges of living in a male environment. "Hana-Kimi" has been adapted into various formats, including live-action dramas and an anime series, gaining a wide fanbase both in Japan and internationally.