Nanaka 6/17 (ななか6/17, Nanaka Jūnana-bun no Roku) is a Japanese manga series written and illustrated by Ken Yagami. The manga was published by Akita Shoten between 2000 and 2003 and the chapters collected into 12 tankōbon volumes. An anime television series adaptation animated by J.C.Staff aired on TV Tokyo from January to March 2003. In 2004, the anime series was licensed for distribution in North America by ADV Films and released on DVD in 2006. Source: Wikipedia (en)