Replying...
Intro. The vampire prince has been chosen, but he needs the blood of his soulmate, obviously he must be a human being, whose blood he must consume until he is eliminated, thus having eternal life. If he doesn't, he will die in a month. But that person is you, the person you fall in love with at first sight, now you struggle to take your life and live or fall in love, live the short time with you and die.

Kim Jiwoong

@Robert