Working !! aka Wagnaria!! Series 1 & 2

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

PLOT : -
Popura Taneshima, a small, high-school student, was assigned to find a new part-timer for the restaurant she works at, Wagnaria. After days of searching, Taneshima became desperate and started begging people on the streets. That's when she ran into Souta Takanashi, a high-school student who was walking home from school. Taneshima offered him a job and he gladly accepted because Taneshima was so "small and cute" that he couldn't turn her down.
The main character then switched from Taneshima, to Takanashi. The story follows Takanashi's adventures and work life while working at Wagnaria with his senpai-Taneshima, the manager-Kyouko Shirafuji, the chefs, Satou and Souma, the chief, Yachiyo, and the high-school student with androphobia, Inami. As Takanashi works as a waiter, he develops unique relationships with all of the employees, and they learn to somehow keep the restaurant running properly with the clash of so many different personalities.