Reincarnated To Another World with My Ex

Kazu and Yuri the most popular and sweetest couple of their school separated ways when they graduated from high school, when they went into the college they both lived their own lives with their new GF and BF, but a sudden twist of fate happened when Kazu tried to save Yuri from a truck that was about to hit her, Kazu died from being hit by the truck while Yuri died from being hit by the car that followed it. As if fate was playing with them, Kazu reincarnated in a magical world with 17'th century technology as a prince of a kingdom while Yuri reincarnated as the prince's fiance. Will they recognize each other after reincarnating with different faces and names? Will they realize the feelings they still have for each other? What are the dangers they will encounter in another world with a huge responsibility in their hands?