A youth school sports comic about the struggles of Miyuki Shinozuka, also known as Milky Sensei, a physical education teacher with extraordinary athletic ability. Shuntaro, a junior high school student, is anxious when his powerful older sister, Miyuki Shinozuka, who rides a motorcycle at speeds that overwhelm biker gangs, comes to his class for teaching practice. And on the first day of his training, Miyuki tries to become a "normal teacher" by wearing clothes made by his older sister, Mitsuki, but...!?