Find the Runaway Princess

The two heirs of a country have a rivalry,
Elysia and Rakan
They met as seniors and juniors at Neutral National Academy.
After a bad first meeting, the two fall in love…
“Ellie. If you wanted to run away from me, you should have hidden until the end.”
“If you want to kill, kill.”
“No, somehow I will keep you alive and by my side for as long as I want.”
The relationship between the two changes…