@Rayshiz I think you are misunderstanding something. The Prince will take the Dragonia flower now to cure his illness but since Eirin sleeps for 5 years he meets her after she wakes up. The Prince will get better soon.🙂
I like to post spoilers for the stories I find interesting because I don't have much time to read novel due to busy schedule
you will find me in most romantic historical manhwa comment sections 
you will find me in most romantic historical manhwa comment sections 