From MangaHelpers:

The story opens several years after a devastating war, where incredibly strong 'mechanical dolls' slaughtered many, many people. These robot weapons, which look exactly like humans, are still feared and hated. During a storm, Kuro finds one of these 'dolls.' She is nothing like the weapon he would expect, but is instead gentle, cheerful, and very eager to be of use to the people around her. She claims her name is Mayple, and she seems to be programmed as a maid and cook.

Soon, Kuro has set up a cafe for Mayple to run, where she can cook sweets and tea for everyone in town. It's going to be a rough road ahead of her, as many townspeople hate her on principle and will not shrink from violence against her. But maybe Mayple, who always keeps a sunny attitude, will be able to find a way through the prejudice and make a place for herself in the post-war world. [tethysdust]