Working!!

Working!! is a manga written and illustrated by Karino Takatsu. It began serialization in the January 2005 issue of Square Enix's Young Gangan seinen manga magazine. The first Tankōbon was released in November 2005 in Japan; as of March 2010, seven volumes have been released. Square Enix released three drama CDs between 2007 and 2009 with scripts written by Shōgo Mukai. An anime series produced by A-1 Pictures and directed by Yoshimasa Hiraike began airing in Japan on April 4, 2010.

Plot
Set in a family restaurant in Hokkaido, the northern prefecture of Japan, 16 year old high school student Takanashi Souta works part-time along with his strange co-workers: Taneshima Popura, a high school girl who's a year older than Souta who's easily mistaken for an elementary/middle schooler, and Shirafuji Kyoko the 28-year old store manager who doesn't bother to do any work at all.

Official

 * Square Enix's Official Website
 * Anime's Official Website
 * NIS's Official Website

Other Sources

 * Wikipedia
 * Anime News Network (Manga)
 * Anime News Network (Anime's 1st Season)
 * Anime News Network (Anime's 2nd Season)