Responses

Is it this
https://www.mangago.zone/read-manga/i_became_the_youngest_sister_in_law_of_the_male_leads_in_a_tragic_reverse_harem/
but this one the mc has three sister and ur desc actually match most of the story except the amount of sister

I thought of https://www.mangago.zone/read-manga/an_unseemly_lady_wicked_dragons/ ? But the big sister isn’t blonde hopefully you find it!
So there's this manhwa about two sisters. The little sister is transferred into that world where her big sister has a 3 potential male lead for the future and if i can remember the three of the male leads are also the big sister's friend. So the MC (The little sister) is choosing which one of the guy is good to be her sister husband. PLEASE HELP ME FIND THIS!!!
If i can remember from the three male leads, one of them is a magician and has a disciple and the magician has a white hair or gray smth lile that, and then a duke (?) who has a cousin and they have a hair between blonde or brown which i remember was choosen by the big sister and the two sister moved to his castle and that's where the little cousin (boy) and the little sister become friends, and the other one has a black hair but i vaguely remember.
HELP MEE PLSS TYSM GUYS