Hana-Kimi volume 4 features story and art by Hisaya Nakajo.

All-male Osaka High School is holding its annual war of the dorms, and everyone must get involved! Unfortunately, even though she'd be happy to just compete in the 500-meter relay, Mizuki is forced to enter the Cross-Dressing Pageant... and pretend to be a boy pretending to be a girl! Worse still, a rival dorm targets Mizuki as a threat to their athletic supremacy! Can dorm chief Minami Nanba make winners out of his class while dealing with his own secret traumas?

Includes bonus story, "The Thirsty Moon."