The Combat Baker and Automaton Waitress(2015)

Tatakau Panya to Kikaiji kake no Kanbanmusume

The war hero known as Silver Wolf - Lud Langart - pilots a humanoid assault weapon while he dreams of life as a baker. With the war over, Lud now peacefully runs his bakery, but thanks to his frightening scowl, he can't sell a single loaf of bread. After posting an ad for a waitress in a last ditch effort to save his business, who should reply but a beautiful silver-haired, red-eyed young girl. What Lud doesn't know is that this new waitress was born from Avei, his AI partner installed in the humanoid assault weapon he piloted during the war.

(Source: BookWalker Global)