Undercover maid

As a "professional" undercover agent, she can't devote herself to true feelings, but she likes her master! Well, she chose to leave after the case came out! Seven years later, the two met again, and she became his "maid" again! The misunderstanding between the two was solved and deepened, and there seemed to be an insurmountable river between the two. How will they write the outrageous master-servant relationship?