Help me find this bl pls im begging😭

Vampirey style, i think, where the main mc who is blonde lowkey passed out in the beginning of the story

the top has like dark hair and the main villain wants mc, he has white long hair

the format was lowkey black and white i think maybe there was color

and the white hair turns into the top at one point to do the deed.

I never really saw anyone talk about it pls help i read it around 2020😢😢