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Manhwa where ml is long silver haired and FL is long black haired . The opposite characters are crown prince with short black hair and saintess with long pink hair .
if the ML is a magician then this is it: https://www.mangago.zone/read-manga/failed_to_abandon_the_villain/
Did u also notice what I did ? They are wearing couple outfits . The pink one matches to the black one he is wearing