You are Ms. Servant

A brief description of the manga You are Ms. Servant:

A girl in a maid’s uniform came to Hitoyoshi’s house looking for work. She used to be an assassin and is adept at inflicting death, but she is new to housework. Hitoyoshi was embarrassed by her strange request and he told her to leave. But then she saved Hitoyoshi from an accident, and he thought maybe they could get along? This is a story about a maid who was a cold-blooded killer, and who tries to learn new emotions. She, who lived a lonely life, finally found a family. The beginning of a pleasant daily life.