It is confirmed. Working!! TV anime gets a second season. The official website also features a trailer in which several characters (Yamada, Poplar and Sota) talk about the new season. Working!! anime was adapted from Karino Takatsu’s 4-panel manga which revolves around a story about Sota Takanashi and friends who works part-time in a restaurant headed by an eccentric boss.
Working!! 2nd season production will done by A1 Pictures,
Trailer as below
Official website can be found here