Nanaka is a 17 year old girl. After a quarrel with her long time friend Nenji, she has an accident. When she awakes in the hospital, she believes that she\'s only 6 years old, her body having turned into an adult through magic, just as in her favorite TV series \"Magical Girl Domiko\". But having a mental age of 6 is tough when you visit junior high school. So there\'s a lot of trouble waiting for her and for Nenji, who tries to cover up for her.