Nana

So i can't find this manhwa. It's completed. So the story is abt a Fmc who was like a slave to this one tree cult place where people there had blond hair and were fair skin. They also had super power which they used by using a stone they mined illegally from this north snowly area and they also hated the people of that north snowly area cuz they believe they can ascend to heaven only after killing em. And Fmc is like in love with that snowly place's king and the king of those blond people likes fmc. He is also the villian. The blonds are also obsessed with a tree. I'm sorry my explanation sucks but pls helppppp ┗( T﹏T )┛

So idk the name of this manhwa, I forgot since i read it way back but tge plot was something like the FL had a stalker who dressed himself as a girl in order to get close to FL, they end uo dating but when she finds out she run away. Oh and FL has blue hair and the stalker had purple hair.