The Medical Girl Has No Heart: the Prince Regent's New Year's Eve Tribulation

When they first met on a snowy night, she failed in a last-ditch attempt and had no choice but to save him. The fireworks were brilliant, and he looked towards the other side, recalling all the past events. "Your perfect match~wait until the fireworks are brilliant!" Is it him? Or her? The regent, who holds all the power in the government, actually has a crush on a young doctor? A country doctor who disguised herself as a man was able to trick the prince of the dynasty? By mistake? Or is it fate?