The poor heroine was coerced by her evil father and prayed at her mother's grave to start her life over again. Unexpectedly, after a series of strange things happened, she inexplicably became... A servant of a wealthy family. And she is born as a boy, and there is a devilish master who is difficult to serve and loves to make things difficult for others. When the male protagonist discovers that his personal servant's cowardly personality has turned 180 degrees into a sinister, corrupt and poisonous queen, what will happen between them? [Don't forget that the heroine was once the boss (well, this structure is a bit bloody)]