the 2nd one - https://www.mangago.zone/read-manga/it_looks_like_i_ve_fallen_into_the_world_of_a_reverse_harem_game/
https://www.mangago.zone/read-manga/i_ll_just_live_on_as_a_villainess/
?? it sounds familiar but i can’t exactly pin point it, sorry if these aren’t the manhwa ur looking for
tysm tysm the 1st i read it wasnt that the second one u mentioned i have not read. um the i dodnt thunk its miss not so sidekick but i rmbr it had intersteresting art style may be like more water colorey maybe?
like when they introduce her they show a map like a game map of the kingdom and how she is one of the villainesses and theres another villainess on the other part of the map
didnt think*
1. its a manga, so japanese style villainess/otome isekai fmc has 2 bro and whole society believes the one of the brothers will inherit the fam title, but fmc ends up inherits it. cuz she saved everyone from the plague or something like that.
2. the body fmc trasmigrates, to is supposed to one of the viallinesses of high society, with beautiful long past waist red hair, and white skin. She also has tons of businesses, and cant stand anyone getting better things than her.