Looking for a manga

Looking for a manga from years ago idk whether it was a manga or manhwa etc but it was in full colour where the ml saves the fl from drowning n like she works as a maid for 3 rich guys from the top four elite families w a secret 4th one in some love triangle thing but then she ends up with the one that saved her but mls family doesnt want her to be with him bcs shes poor but then she reveals herself to be the secret fourth rich family and they get together and yes pleasee help me find