beta
i think mc has some sort of brown hair and i think may be green eyes, i think i saw it on a ad or soemthing
the plot was that she was married off to a duke or marquis i think has dark hair is on the colder side, and at night his persona changes into alter ego with white/blue/silverish fluffy hair and opposite of his usualy cold persona and he kinda becomes mc's friend/ lover the more mc meets with the alter she hates the duke in normal for being cold she doesn't know that they r the same person i think, in the beginning they also mention her summoning a demon to go back in time or something like that?
it may have had a smut tag idk?