![](https://cdn.animecharacters.io/images/anime/large/708-1d6e1146.jpg)
Format
TV
Episodes
12
Episode Duration
25 min per ep
Status
Finished Airing
Premiered
Winter 2003
Aired
2003-01-09 to 2003-03-27
Source
Manga
Rating
PG-13 - Teens 13 or older
Genres
Comedy
Drama
Romance
Shounen
Slice of Life
Studios
J.C.Staff
Producers
Genco
Licensors
ADV Films
Nanaka 6/17 (ななか6/17)
Seventeen-year-old Nanaka Kirisato is a high school student serious about her studies and goals in life. She frequently criticizes her best friend, Nenji Nagihara, for being a childish delinquent who spends his time fighting other boys. Then one day, after a heated argument with Nenji, she falls off a flight of stairs and suffers a brain injury, resulting in her mind reverting to that of a six-year-old. With this in mind, Nanaka's father and Nenji must keep her injury a secret as she struggles to live a normal life and grow up all over again. (Source: ANN)