Responses
I think it's Royal Servant (black haired though not a vampire ml x white haired mc, they fucked in the balcony as well)
https://www.mangago.zone/read-manga/royal_servant/
ah yes, it's this one! thanks :)
i don't remember the plot at all
it's a completed manwha. iirc, the mc was a white haired quiet beauty type and the ml was a black haired vampire or something like that...? there was a scene where they fcked in some balcony
there was also a side couple in the series........ though i also don't remember them