Everyone at one point has a mate, even humans and well immortals

in this case, you were Sunghoon's mate

you would've never wished for such a cold hearted mate and cold blooded, he didn't seem to care about anything but using you as a source of power

you were almost convinced he didn't love you

"I'm running out of energy" Sunghoon was extremely pale he almost looked dead

"Blood.." he mumbled