Charlotte: Toaru Jijo no Shirozukae Monogatari

One year ago, her parents vanished.

Left all alone, Charlotte spends her days working as a maid in the castle. On her days off, she always returns to her family home, keeping it tidy so that her parents can settle back in the moment they return. But one day, she arrives to find a complete stranger inside! With trembling hands, Charlotte grips her wooden sword and prepares for the worst...!

(Source: Square Enix)