One day, high-schooler Hitoyoshi gets an unexpected visit from a maid at his home. With her black hair, graceful manners, and a peculiar request to be hired, she turns out to be a former assassin with a knack for clumsiness. Their encounter leads to a shared life under one roof, where her emotionless heart begins to stir... This is a story of a lonely maid finding a “family.”

[Source: Crunchyroll]