Why is the Emperor-Prime Minister Route Unachievable?

“Was it but a fleeting dream to Your Majesty? What kind of dream pries open my lower gate and mutters that it is an obscene lower gate?” Yeon Ha-yoon, the Prime Minister of the Imperial Empire, has a grievance he cannot tell anyone. His lord, the Emperor, has fallen head-over-heels for a prince from the borderlands and keeps ruining the country. But that wasn't all. After trying to stop the depletion of the national treasury, Yeon Ha-yoon was sent into exile, only to eventually hear the news that the mad Emperor's head had fallen due to a rebellion by the vassal states. And on that day, Yeon Ha-yoon returned to the exact ×-ing point in time three years ago when the Emperor first fell in l...