The heroine is not a weak substitute daughter, but an ace agent trained by the country's highest military department, the "Military Intelligence Service", code-named "Rose". She has been lurking next to the hero for three years. On the surface, she is a submissive abandoned wife of a wealthy family, but in fact, she is trying to collect irrefutable evidence that the hero's family is suspected of smuggling arms and colluding with foreign forces. The male protagonist is not a cold-blooded overlord on the surface. He has already noticed that the female protagonist's identity is abnormal, but he has other motives. The couple tests each other and competes with each other in a marriage that seems to be in harmony but is inseparable. Until the night when the divorce agreement was signed, the masks of both parties shattered at the same time, and a top-notch "Hunter vs. Hunter" game officially began.