You are Ms. Servant

One morning, Hitoyoshi Yokoya answers his door to find a strange girl in a maid outfit. She has no name, but she insists on becoming his servant, claiming her previous master sent her to his household. She also reveals her training as an assassin. Unsettled by her dark past, Hitoyoshi tries to refuse her-but when she accidentally leaves something behind, he chases after her and nearly gets hit by a truck. The girl saves him with lightning-fast reflexes, and he reluctantly agrees to let her stay. Despite being a trained killer, she’s hopeless at everything else, having spent her whole life mastering only that one skill. Still, Hitoyoshi accepts her, urging her to leave her grim past behind and embrace a brighter, ordinary life. To make it official, he gives her the name "Yuki," setting her on a new journey toward redemption and happiness.